Great mag-ad - Stern Defense MAG-ADMP45 AR-15 M&P .45 ACP Magazine Conversion Adapter

Purchased this a year ago, had all sorts of problem with feeding. Contacted Stern, they pointed me in the right direction. If you go this route, you HAVE to use the Stern bolt and 11oz buffer. Believe me, don’t use anything else. I was using A Foxtrot bolt, that’s a no go. The Stern bolt is machined different so it doesn’t hit the mag. Moving the adapter up moves the mag up as well, hitting the face of the bolt, instead of catching the round on the way home. Going cheap-o gave me one shot and a jam, maybe two shots, but it would jam ALL the time. Changed to the Stern buffer and bolt, 200 rounds later, not one issue. This with some HST, intruders, ye be warned.