To every one that said this wouldn't be reliable, this is the first ar15 I have ever had that doesn't care what ammo I put in it.
Today my BCG & CH came in so I put in on my other lower to test every thing out and wow. Tula, Wolf, brown and silver bear, pmc, federal, Winchester white box, and some golden tiger, were all bump fired for a whole 30rd mag and had no issues at all.
This is an A2 upper with a Model 1 sales light barrel, and a Palmetto State Armory BCG & CH.
Total build is at about $650
just waiting on my stripped lower which should be here by Friday. I will post pix of the complete build.