Next to the original 5.56mm NATO/223, the 300 AAC Blackout (BLK for short) is the most popular chambering for the AR-15 platform ... exactly what makes for the best 300 Blackout ammo in the ...

The lower has a steel reinforces latch point and it ships with an extended 3-oz. buffer. The finished .300 BLK takedown AR pistol build assembled. I'm fond of 20-round magazines for AR-15 pistols ...

Of course, AR rifles and its variations can be obtained in larger calibers, such as .300 AAC Blackout ... 1.62-inch 15-round group at 50 yards. The 110-grain load also performed best in function ...

The various components that comprise the AR ... 300 blackout rounds or .308 rounds. Alas, that will be pricier if you decide to go that route. There are six key elements to your AR-15 profile ...