It's a OK man, I was a little short (and a lot tired) last night and it was probably a bad time to be asking questions.... as far as rifles I have built... there are 3, all bolt guns, and all to varying degrees of "built", in 338 edge, 6mm ai, and 7mm08. So I'm not gonna lie, the whole gas system scares me a bit... also while referring to armalite parts, I thought you were referring to armalite patterned parts, not the actual manufacturer
Side note your thread links do have some very useful info, thanks for linking them