How much would it cost to buy back 14 years active service to put towards a GS position?

SSG Nathan Stryker makes sense. Always unfortunate to see someone separated for medical so close to the end.

That is not necessarily true. I retired as a MSG with 21 years of AFS and the forecast for my FERS retirement at 21 years of service at GS12 step 10 is more than my Army retirement. At this I am not buying my military service because the difference isn’t enough to make up the cost. In addition to my FERS retirement the Government has been pitching in 5 percent to my TSP in matching funds. Those matches are not available to Soldiers (the TSP was not available when I was on active duty) and just the match will exceed $90000 and that doesn’t include the growth from those matching funds. To be fair, the dollar comparison between the two retirements is only part of the necessary comparison. My cost for TRICARE prime is about 5 percent of what my peers that didn’t retire pay for their medical insurance.

MSG Gary Eckert that doesn't apply in this case. An AD retirement for most people at 20 years starts paying immediately, while they would have to wait till 60 or so to collect the FERS retirement. The major benefit of the Active Duty retirement is that you're collecting retirement for 20 years or so before other retirees. The new BRS retirement also has TSP matching for those who choose the BRS, but like the FERS you can't collect that till you are retirement age.