Help with converting .300 BLK to 5.56

[EPS]

 

[Tony617]

I finished my first home build lower. I bought a single point sling and an Mapul AFG, a light mount, and Magpul MS3 single QD sling and an ambidextrous sling attachment point. I like the single point sling. I have a Magpul BAD lever to put on still.

 

[American123]

I guess I'm the only one here with the .300 blk out who doesn't mind, 'living dangerously.' I just do this crazy thing and look at my loaded mags and if one has .300 BO cartridges in it I don't put it in a .223 upper and vice versa

On the note of AR pistols, that SBA3 arm brace is 'the bees knees.'