Quality magazines - Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 30 Round Rifle Magazine

Having both 5.56 and .300 BLK firearms, using these dedicated .300 PMAGs eliminates any potential mix-ups. (I only use Brownell's aluminum mags for 5.56 applications - another quality magazine choice). Also, I do not question Magpul quality in any way. These mags will reliably feed all .300 rounds from 125 to 220 grain due to their designed-in geometry. I used to just use STANAG mags in my .300 weapons but had intermittent feeding issues with heavier weight cartridges. These dedicated PMAGS have erased this problem entirely. They work, they are priced right and stand up to hard use. They are the only .300 mags I will use, and I recommend them as highly as possible.