How long is 21B AIT for prior service? https://www.rallypoint.com/answers/how-long-is-21b-ait-for-prior-service <div class="images-v2-count-0"></div>How long is the AIT for combat engineer and how do I find out what MO NG units are engineer units? Sun, 23 Dec 2018 15:17:12 -0500 How long is 21B AIT for prior service? https://www.rallypoint.com/answers/how-long-is-21b-ait-for-prior-service <div class="images-v2-count-0"></div>How long is the AIT for combat engineer and how do I find out what MO NG units are engineer units? PFC(P) Private RallyPoint Member Sun, 23 Dec 2018 15:17:12 -0500 2018-12-23T15:17:12-05:00 Response by SSG Private RallyPoint Member made Dec 23 at 2018 5:54 PM https://www.rallypoint.com/answers/how-long-is-21b-ait-for-prior-service?n=4230789&urlhash=4230789 <div class="images-v2-count-0"></div>It&#39;s classes at 12B now. This is an OSUT MOS it was 15 weeks, but I have heard they are making it 21 after the first of the year. SSG Private RallyPoint Member Sun, 23 Dec 2018 17:54:16 -0500 2018-12-23T17:54:16-05:00 Response by SPC Joe Frailey made Dec 24 at 2018 4:17 PM https://www.rallypoint.com/answers/how-long-is-21b-ait-for-prior-service?n=4232748&urlhash=4232748 <div class="images-v2-count-0"></div>How long have you been out? SPC Joe Frailey Mon, 24 Dec 2018 16:17:49 -0500 2018-12-24T16:17:49-05:00 2018-12-23T15:17:12-05:00