So, I have the same build, and my ASC mags are garbage! I have 1 bushmaster, and it’s just as bad. I found some multi caliber mags made by Ross Defenses. They work great…but, you can only load 22,24 rounds in the mags for that caliber. I fed steel and brass through them and they worked flawless. My only problem was the occasional light strike b4 I added the enhanced firing pin.