Posted on Apr 27, 2015
Army seeks gun industry help on M4 carbine...your thoughts?
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The Army is asking the gun industry to build new components for its soldiers’ primary weapon — the M4 carbine — a move that experts say is a tacit admission that the service has been supplying a flawed rifle that lacks the precision of commercially available guns.
At a recent Capitol Hill hearing, an Army general acknowledged that the M4’s magazine has been responsible for the gun jamming during firefights.
On the federal government’s FedBizOpps.gov website, the Army announced a “market survey” for gunmakers to produce a set of enhancements to essentially create a new model — the “M4A1+.” It would include a modular trigger, a new type of rail fitted around a “free floating” barrel and other parts. The upgrade is supposed to improve the rifle’s accuracy and reliability.
I've been saying for quite a while that it's a great platform that needs to be produced with higher quality parts...the parts are out there. I know this because the ones I build are hands-down better quality than what the government is buying....let me know what you think.
Read more: http://www.washingtontimes.com/news/2015/apr/26/army-seeks-gun-industry-help-on-m4-carbine-in-taci/#ixzz3YXFKucxX
Follow us: @washtimes on Twitter
At a recent Capitol Hill hearing, an Army general acknowledged that the M4’s magazine has been responsible for the gun jamming during firefights.
On the federal government’s FedBizOpps.gov website, the Army announced a “market survey” for gunmakers to produce a set of enhancements to essentially create a new model — the “M4A1+.” It would include a modular trigger, a new type of rail fitted around a “free floating” barrel and other parts. The upgrade is supposed to improve the rifle’s accuracy and reliability.
I've been saying for quite a while that it's a great platform that needs to be produced with higher quality parts...the parts are out there. I know this because the ones I build are hands-down better quality than what the government is buying....let me know what you think.
Read more: http://www.washingtontimes.com/news/2015/apr/26/army-seeks-gun-industry-help-on-m4-carbine-in-taci/#ixzz3YXFKucxX
Follow us: @washtimes on Twitter
Edited >1 y ago
Posted >1 y ago
Responses: 55
Stay with the M4 platform, upgrade with known products, let the manufactures try more current tech materials, designs and manufacturing tech at the pieces and parts and let's see what they come up with.
I know for a fact the M4 works as designed.... I know for a fact it can be handled by a wide range of service members well, learned to a moderate skill level quickly and mastered by most if the training and motivation is there.
I know for a fact the M4 works as designed.... I know for a fact it can be handled by a wide range of service members well, learned to a moderate skill level quickly and mastered by most if the training and motivation is there.
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I am a Professional in the Firearms Industry. I suggest that the Army do these things:
1) Add a Piston Drive Operating system like found on the LWRCI M6. It takes cleaning time from hours to minutes, runs 90-100 degrees cooler.
2) Coat bolt and bolt carrier parts with Nickle Boron, reducing the amount of oil based lubrication needed.
3) Stop trying to turn it into the Swiss Army Rifle. Loading it down with stuff affects accuracy and is just heavy. Remember, if you want a 9 pound rifle, issue an M-14 it has longer range and more stopping power.
4) Go to a FRANGIBLE round. It is not Open tip nor expanding so it does not violate the Hague Convention, but it knocks bad guys on their asses.
5) Teach Soldiers how to Clean a rifle WITHOUT Ruining it! Getting all the carbon off a weapon at the cost of damaging the finish is just plain STUPID. If you use a steel screw driver as part of your normal cleaning kit, you are a Chicken Noodle Sandwich. Leave a little Carbon (A Little does not mean caked on) on the rifle will not hurt a thing.
and Lastly...
6) Issue most of the Army...RIFLES, not M-4 carbines, 20 inch, longer range, full size rifles. Issuing M-4s to everyone is like when General Keene said one reason they were giving away berets was so Soldiers would "Feel Good about themselves" (I am not kidding and it is just as sad today as it was when he said it). Some troopers need a carbine, but not as many as are carrying it right now.
'Nuff said about that, don't get me started on that milled out spot on the barrel that just machined in a weakness in the barrel rather than using a new mounting clamp for the M-203...But then a 203 gunner is a prime example of a dude that NEEDS a R-I-F-L-E.
1) Add a Piston Drive Operating system like found on the LWRCI M6. It takes cleaning time from hours to minutes, runs 90-100 degrees cooler.
2) Coat bolt and bolt carrier parts with Nickle Boron, reducing the amount of oil based lubrication needed.
3) Stop trying to turn it into the Swiss Army Rifle. Loading it down with stuff affects accuracy and is just heavy. Remember, if you want a 9 pound rifle, issue an M-14 it has longer range and more stopping power.
4) Go to a FRANGIBLE round. It is not Open tip nor expanding so it does not violate the Hague Convention, but it knocks bad guys on their asses.
5) Teach Soldiers how to Clean a rifle WITHOUT Ruining it! Getting all the carbon off a weapon at the cost of damaging the finish is just plain STUPID. If you use a steel screw driver as part of your normal cleaning kit, you are a Chicken Noodle Sandwich. Leave a little Carbon (A Little does not mean caked on) on the rifle will not hurt a thing.
and Lastly...
6) Issue most of the Army...RIFLES, not M-4 carbines, 20 inch, longer range, full size rifles. Issuing M-4s to everyone is like when General Keene said one reason they were giving away berets was so Soldiers would "Feel Good about themselves" (I am not kidding and it is just as sad today as it was when he said it). Some troopers need a carbine, but not as many as are carrying it right now.
'Nuff said about that, don't get me started on that milled out spot on the barrel that just machined in a weakness in the barrel rather than using a new mounting clamp for the M-203...But then a 203 gunner is a prime example of a dude that NEEDS a R-I-F-L-E.
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SSG Roger Ayscue
Gentlemen, I love this! Being in this industry, I am surrounded on a daily basis by firearms and ammunition and the stuff that goes with it. Conversations like this stimulate the mind and make you think outside the box.
What is the increase in MV in the M855A2 if it is a hotter load? Just a really really ancillary question, BUT, if the MV and ballistic performance of the M855A1 is not the same as the M855 it is replacing, that will toss out a whole bunch of ACOG Sights. As it is that the reticle of the ACOG is based upon the M855 and it's ballistic performance, this means that the TA01 thru the TA31 series, in the 5.56mm will have a BDC that is not correct.
What is the increase in MV in the M855A2 if it is a hotter load? Just a really really ancillary question, BUT, if the MV and ballistic performance of the M855A1 is not the same as the M855 it is replacing, that will toss out a whole bunch of ACOG Sights. As it is that the reticle of the ACOG is based upon the M855 and it's ballistic performance, this means that the TA01 thru the TA31 series, in the 5.56mm will have a BDC that is not correct.
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LTC Paul Labrador
SSG Roger Ayscue I've attached an article I found discussing the M855A1 and some slides from the PAO brief.
http://www.americanrifleman.org/articles/2014/5/21/testing-the-army-s-m855a1-standard-ball-cartridge/
From the article and slides, the flight ballistics of the two rounds are nearly identical but the article states that there was some variation of POI between the two. MV is "boosted" but cannot find a specific number. Chamber and port pressure are also increased which is what is leading to increased wear. Now we all know that MilSpec doesn't necessarily mean "best quality". Improved quality of part can offset the increased wear.
http://www.americanrifleman.org/articles/2014/5/21/testing-the-army-s-m855a1-standard-ball-cartridge/
From the article and slides, the flight ballistics of the two rounds are nearly identical but the article states that there was some variation of POI between the two. MV is "boosted" but cannot find a specific number. Chamber and port pressure are also increased which is what is leading to increased wear. Now we all know that MilSpec doesn't necessarily mean "best quality". Improved quality of part can offset the increased wear.
Testing The Army’s M855A1 Standard Ball Cartridge
Spanning a decade-and-a-half, the process of adopting the lead-free 5.56x45 mm NATO M855A1 ball cartridge was hardly transparent. In the end, however, testing indicates that our troops ended up with a better combat round.
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The M16/M4 Lower is a great modular platform. It is easily configured into a variety of set-ups.
However... Like our M40 short/long action sniper rifles, it's all the other pieces that we add onto it that really matter.
A good "AR" runs $1200~. The government buys theirs for about $600-700.00. Sure, I could put together lot's better guns that the Army/USMC than they could. They would cost 2x-4x as much too.
For what it is, and what it costs, the M4 is amazingly nice. It really is. It's inexpensive, shoots straight, can be field repaired by darn near anyone, and has readily available parts. Are there nicer guns? Yep. Does it make sense to swap to something else? Nope. Does it make sense to do limited "up-gunning" on an as-needed basis? Sure. That's why this modular gun is so great.
Swap out the triggers. Swap out the upper receivers. Then the barrels. Piece by piece until it's practically a new gun.
However... Like our M40 short/long action sniper rifles, it's all the other pieces that we add onto it that really matter.
A good "AR" runs $1200~. The government buys theirs for about $600-700.00. Sure, I could put together lot's better guns that the Army/USMC than they could. They would cost 2x-4x as much too.
For what it is, and what it costs, the M4 is amazingly nice. It really is. It's inexpensive, shoots straight, can be field repaired by darn near anyone, and has readily available parts. Are there nicer guns? Yep. Does it make sense to swap to something else? Nope. Does it make sense to do limited "up-gunning" on an as-needed basis? Sure. That's why this modular gun is so great.
Swap out the triggers. Swap out the upper receivers. Then the barrels. Piece by piece until it's practically a new gun.
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CW3 Kevin Storm
I think some simple mods like a the Smith and Wesson 5R barrel instead of a NATO 1:9 barrel would be a huge improvement. Mag pull mags work, ditch the tried and failed aluminum ones. Lets not try to turn the M4/M16 into the ultimate rail attachment device. I have seen every damn thing mounted on a rifle shy of an espresso machine. and for what purpose? I like the "keep it simple stupid approach" It should be tough, jam resistant, shoot a bizzilion tons of cruddy ammo without needing 10 hours to clean it. I find the accuracy of the rifle has never been a major issue, its the ammo which is ungodly cruddy. The Army's insistence that it be cleaned with CLP, which in todays day and age of superior synthetics is not the answer. Troops have far too much to do with the little time available to them.
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LTC Paul Labrador
CW3 Kevin Storm 1:9 cannot stabilize the long (but light for it's length)M856 tracer rounds, which is the very reason why they adopted 1:7 barrels in the first place. Since civilians don't typically shoot tracer rounds, 1:9 has become an acceptable alternative.
BTW I agree that the military goes a bit too far with cleaning. There is functional clean and then there is white glove inspection clean. The issue is that most want the latter, then the former is all the weapon needs to be reliable.
BTW I agree that the military goes a bit too far with cleaning. There is functional clean and then there is white glove inspection clean. The issue is that most want the latter, then the former is all the weapon needs to be reliable.
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Cpl Frank Caneja
Changing simple things like the bolt, front and rear site , and a better barrel would make such good improvements. Granted changing all three would be the cost of the rifle its self, I think just changing the bolt for smoother operation, and sights for better sight acquisition would be a great way to go.
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I see a lot of uneducated banter being tossed around by people who are discussing things they have little or no first hand knowledge of.
First off, the M4A1 used by SOF today has been tweaked and improved so much that the rifle is leaps and bounds ahead of the first M4s introduced into the service in the early 90's and might as well be a ray gun when compared to the CAR-15s of the Vietnam War era. There have been over 80 improvements to the design, most of which would be missed by the casual observer. The M4A1 of today handles heat stress extremely well. You can easily fire 500 rounds between cleanings before having to worry about stoppages. Even then, a few drops of oil will get you back into action for a few hundred more rounds before you have to shotgun the rifle and wipe the bolt and run a bore snake through the barrel. It can reliably hit targets out to 500 meters with both the 14.5 and 10.3 inch barrels and the new flash hiders and Geissle triggers have also significantly improved the M4A1's performance. The Army as a whole is moving to the SOF version of the M4A1 and the transition has already begun with some conventional units.
The vast majority of those who say we should go back to a 7.62mm rifle have not carried a 7.62mm rifle in combat with a basic load or run through Combat Marksmanship (CMMS) drills with one. Does having a few 7.62mm rifles in a platoon make sense? Absolutely, but it makes zero sense to transition back to a 7.62mm basic service rifle for the entire military. Yes, SOF uses the SCAR-H. However, just like the wide range of other rifles in these units, the SCAR-H has its purpose and is not the rifle of choice for everyday use, the M4A1 is. Even those SOF Soldiers who have extensive experience with firing foreign weapons still prefer the M4A1 over other service rifles.
People complain about the stopping power of the 5.56mm round but very few of those people are actually trained to kill a man. They are trained to shoot center mass because center mass is the easiest thing to hit and is the easiest thing to teach to tens of thousands of trainees a year in basic training. It isn't, however, necessarily the best place to instantly incapacitate or kill a man. To achieve the best results, shooters need to know basic human anatomy and know proper shot placement and proper hold over/under at the proper ranges.
In the hands of the average Soldier in the Army, having a 7.62mm rifle over a 5.56mm rifle will ultimately have minimal impact because they don't receive the advanced shooting skills to properly employ either rifle to their maximum potential. Even the addition of things like monolithic uppers or pistons as opposed a gas operating system is negligible as most Soldiers, even your basic Infantryman, will not fire enough rounds in a day to matter (even in combat) and most Soldiers struggle to hit a 300 meter target let alone a 500 meter target.
Let's look at improving marksmanship training before we discuss changing the basic service rifle because a rifle is ultimately only as good the shooter.
First off, the M4A1 used by SOF today has been tweaked and improved so much that the rifle is leaps and bounds ahead of the first M4s introduced into the service in the early 90's and might as well be a ray gun when compared to the CAR-15s of the Vietnam War era. There have been over 80 improvements to the design, most of which would be missed by the casual observer. The M4A1 of today handles heat stress extremely well. You can easily fire 500 rounds between cleanings before having to worry about stoppages. Even then, a few drops of oil will get you back into action for a few hundred more rounds before you have to shotgun the rifle and wipe the bolt and run a bore snake through the barrel. It can reliably hit targets out to 500 meters with both the 14.5 and 10.3 inch barrels and the new flash hiders and Geissle triggers have also significantly improved the M4A1's performance. The Army as a whole is moving to the SOF version of the M4A1 and the transition has already begun with some conventional units.
The vast majority of those who say we should go back to a 7.62mm rifle have not carried a 7.62mm rifle in combat with a basic load or run through Combat Marksmanship (CMMS) drills with one. Does having a few 7.62mm rifles in a platoon make sense? Absolutely, but it makes zero sense to transition back to a 7.62mm basic service rifle for the entire military. Yes, SOF uses the SCAR-H. However, just like the wide range of other rifles in these units, the SCAR-H has its purpose and is not the rifle of choice for everyday use, the M4A1 is. Even those SOF Soldiers who have extensive experience with firing foreign weapons still prefer the M4A1 over other service rifles.
People complain about the stopping power of the 5.56mm round but very few of those people are actually trained to kill a man. They are trained to shoot center mass because center mass is the easiest thing to hit and is the easiest thing to teach to tens of thousands of trainees a year in basic training. It isn't, however, necessarily the best place to instantly incapacitate or kill a man. To achieve the best results, shooters need to know basic human anatomy and know proper shot placement and proper hold over/under at the proper ranges.
In the hands of the average Soldier in the Army, having a 7.62mm rifle over a 5.56mm rifle will ultimately have minimal impact because they don't receive the advanced shooting skills to properly employ either rifle to their maximum potential. Even the addition of things like monolithic uppers or pistons as opposed a gas operating system is negligible as most Soldiers, even your basic Infantryman, will not fire enough rounds in a day to matter (even in combat) and most Soldiers struggle to hit a 300 meter target let alone a 500 meter target.
Let's look at improving marksmanship training before we discuss changing the basic service rifle because a rifle is ultimately only as good the shooter.
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SGT Richard H.
Well said. I actually said most of what you said as well, but spread out over several comments. There were a few things you brought up that I wasn't aware of, such as the Geisele trigger being incorporated into the A1...I actually phrased that as a suggestion.
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PFC (Join to see)
The Geisele triggers are relatively new upgrades for the M4A1 along with extended rails for the 14.5 inch uppers. Rumor has it that the front sight posts will eventually be done away with and replaced with gas blocks and low profile, folding, rail mounted front sight posts as part of the next "tweak".
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SSG Roger Ayscue
Good Points Bob. I think that the Stock trigger is fine and while I love Geissele triggers and I sell a Boat Load of them every week, they are NOT, in my humble Opinion, suitable for burst or full auto fire. A great trigger is from Rock River, their two-stage national Match, which I have retro-fit in 10 of my 18 AR-15s (Yes, I have 18 ARs and my wife is very patient with me.
I agree with the LTC that I am in the conversation with above on one very key thing in this conversation as a whole, way too many "fine to super-dooper swell" modifications and upgrades to AR15s and Civilian rifles that are called M-4s are TOTALLY UNSUITABLE to a Combat Rifle. I have a Three-Gunner that works for me and a big percentage of my customers are Three-gun competitors. All that happy horse pucky about holding the rifle by the barrel at the front sight with your arm extended all the way stiff out there is GREAT....IF Nothing is going to shoot back at you, but that technique sucks balls when you are clearing a room in a building full of bad guys. You are likely to be grabbed by said bad guy and then swung into a door frame like a towed jumper. So, take it from an Old Guy that still Eats, Sleeps and Breathes Eugene Stoner's invention, lots of stuff that is just Swell on your civilian GUN, has no place at all on your issued Weapon.
I agree with the LTC that I am in the conversation with above on one very key thing in this conversation as a whole, way too many "fine to super-dooper swell" modifications and upgrades to AR15s and Civilian rifles that are called M-4s are TOTALLY UNSUITABLE to a Combat Rifle. I have a Three-Gunner that works for me and a big percentage of my customers are Three-gun competitors. All that happy horse pucky about holding the rifle by the barrel at the front sight with your arm extended all the way stiff out there is GREAT....IF Nothing is going to shoot back at you, but that technique sucks balls when you are clearing a room in a building full of bad guys. You are likely to be grabbed by said bad guy and then swung into a door frame like a towed jumper. So, take it from an Old Guy that still Eats, Sleeps and Breathes Eugene Stoner's invention, lots of stuff that is just Swell on your civilian GUN, has no place at all on your issued Weapon.
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PFC (Join to see)
I'd be interested to hear you expand your opinion on the Geissele triggers as it pertains to burst and auto. We haven't run them through their paces but we haven't had any issues yet. They hold up really well with semi-auto rapid engagement drills and there is a noticeable improvement in the follow on shot with the smoother trigger pull.
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The M-4 is a great platform. Is it perfect? Absolutely not! What it has going for it is that it is modular, upgradable, accurate, and easy to us. Just look at the 1911.
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SGT Richard H.
That's my thought as well...it could use upgrading, yes, but that doesn't mean replacing them.
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SGT Bryon Sergent
There is no way to do a cost analysis. the break that the government alone gets could never be figured out. Chrome barrel, Titanium firing pin, on and on. If your going to spend the money WE DON"T have to begin with(sequestration, budget cuts, cutting numbers) then just replace it with something better or more practical. 7.62 was doing fine until NATO made us change to there round(sorry we changed to NATO round).
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1LT William Clardy
SGT Bryon Sergent, the actual numbers are closer to a quarter-million rounds for one kill in Iraq, which makes the Vietnam record of nearly 90,000 rounds per kill seem like precision fire.
Also, we were the ones who pushed NATO to adopt the 5.56mm round as a NATO standard.
Also, we were the ones who pushed NATO to adopt the 5.56mm round as a NATO standard.
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PO2 Ron Burling
Right on, Sgt Bryon Sergent! And don't just switch to the AR10 or some variant. I carried both the M14 and the XM16E1, I had the misfortune to be in the first Seabee battalion to deploy with the XM16A1, we didn't have nearly the issues the "less technically minded" troops did, but the weapon did not instill confidence. I can only guess at the nightmare it must be, operating in a sand, dust rich environment with that aluminum receiver and all the lubricant it takes to keep the damned thing working.
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CW3 Kevin Storm
The 7.62 is a good round, but the not the round of choice for todays main battle rifle. One of the primary issues with the 5.56 is we got away from a devastating bullet that did a great job to a green tipped eco round that doesn't do much of anything, same problem with any round we go to in the future. a 7.62 will do the very same thing as it is a soldiers weapon, and not a crew served weapon. There for the selection for ammunition will be limited to another variation of a green tipped eco round in 7.62. We are also going to find that no matter what round we decide to use in the next generation of the service pistol will be the same issue, as long as we use a solid non expanding bullet the problem will be the same. The FBI can use a variety of different rounds, they do not follow the Geneva Convention, we are limited by it. Our selection of approved ammunition is rather limited. The eco round IMHO opinion will never be the ultimate death dealer, how could it be, it lacks the capacity for expansion ergo it lacks the capacity to create a wound channel, so unless you hit a vitals it won't do the job you want it to do. A round with a cleaner burn would be my preference, the whole porting exhaust to wear you operate the weapon (gas impingement) versus a gas operated rod which keeps hot dirty gas and carbon out of the bolt group has got to be a better solution. The H&K while a good system is too technical and a lot has been written about that it can't be field serviced easily. I also feel MSG Halfmast needs to be smacked side the head with a case of synthetic lubricant and allow the Army to test various lubricant's besides CLP/Breakfree (for those of you who are not familiar with MSG Halfmast he is a cartoon figure on PM magazine, he is not a real person).
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Only real change I could see would be a better trigger. Other than that I dont see any issues with what we have.
Maybe a little more time doing PMI and "trigger" time on the range more than once or twice a year would help immensely.
Maybe a little more time doing PMI and "trigger" time on the range more than once or twice a year would help immensely.
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LTC Paul Labrador
I have a Gisselle trigger on my LWRC M6A5. Never realized how much easier it was to shoot long distance with a match trigger.
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SGT Richard H.
LTC Paul Labrador If I was told that I could change only one thing on the M4, the trigger would be my choice. The standard one is really not good.
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SGT Richard H.
MAJ Carl Ballinger I have the Timney in one of mine also. The one with the Timney is built for accuracy and the trigger is definitely a contributor. In another one, I have the TacCon 3MR....now that one is pricey, but a great shooter in semi and a ton if fun in the "3rd mode"
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If the M4 can be improved upon for a price tag that is cheaper than refitting the entire force with a new weapon, then it would seem that at first glance, the obvious choice would be to retain the M4 and improve it.
The second question is, CAN it be improved enough to justify the expense?
The second question is, CAN it be improved enough to justify the expense?
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Even though I thoroughly hated the M16, (I transitioned from M14 to the original "bad" M16s in RVN) the system has come a long way. Most of the improvements, other than returning to Armalite specs, were probably due in one way or another from veteran ideas/mfg. in the market place. Brilliant idea to tap that growing source of new veteran expertise to up gun the existing platform. I believe I would also like to see some serious govt. testing on the .300 BLK (or any other .30 round that would function with only a barrel change to the system). I am very impressed with my BLK.
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SGT Richard H.
The BLK is a great round for short range, but how does it perform at at 200 & beyond?
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1SG (Join to see)
300 blk is a great round and picking up an upper is on my shopping list but it's a specialty round and should be fielded as such. A bare bones off the line M4 from Colt is a 4 MOA gun which is why when all said and done and you convert 1" at 100 yards to meters and bring it in to a 25m zero range your circle for tolerance when zeroing is right about 1.25". So when you can dump 5/6 rounds in that circle you are within tolerance of the weapon. I would be willing to bet every 300 blk upper out there is a 1 MOA system which at 800m is about 4 times less spread on a shot group before you factor in ammo.
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SPC Donald Moore
1SG (Join to see) , I didn't realize that the accuracy capability with the M4 was so horrible. The beat up old M16A2 I was issued back when I was in would reliably and repeatedly put three rounds in a spot you could cover with a dime. It sounds to me like the military as a whole should get away from the M4 and go to something like an 18" barrel with a mid length gas system. I have that on my personal weapon and can do 1 MOA easily with M855 ammo.
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Never particularly cared for the M-4. IMHO the barrel isn't conducive to long range accuracy with any reliability. I would have preferred to stick with the M-16, even though it is pretty much the same as the M-4 it was definitely more reliable and accurate at ranges exceeding 350 yards. From what I read the magazine is what appears to be causing the issues with the current soldiers life saver, so maybe the only thing that needs an upgrade is the magazine itself. So much for my .02.
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1LT William Clardy
SFC Jack S., I may be a bit fuzzy on the exact numbers but my recollection is that the M193 ball round had a little over 3,200 feet per second of muzzle velocity and the original NATO-standard M855, with a heavier bullet, was reduced to a little over 3,000 feet per second out of a 20-inch barrel.
I have read that they jacked up the chamber pressure on the newer M855-whatever rounds by 20 percent to boost the ballistic performance, but there is a point of diminishing returns on that and I would have a hard time believing that you could get 100 feet per second more velocity out of a 14.5-inch barrel with 20 percent more pressure than out of a 20-inch barrel with the original pressure levels.
I have read that they jacked up the chamber pressure on the newer M855-whatever rounds by 20 percent to boost the ballistic performance, but there is a point of diminishing returns on that and I would have a hard time believing that you could get 100 feet per second more velocity out of a 14.5-inch barrel with 20 percent more pressure than out of a 20-inch barrel with the original pressure levels.
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SPC Charles Brown
SFC (Join to see), I wasn't worried about all the time. But it would have been helpful to be able to hit a target that far out when I saw it. Thanks for the response.
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