I thought I'd share a photo of my first build. I hadn't picked up an AR since I left the Marines back in '78 ......... yes, I'm an old fart!
Built on Mega upper and lower receivers w/DPMS lower kit, 16" Olympic 300 Fireball barrel w/ rifle length handguards and a low profile adjustable gas block underneath them. YHM flip up front sight and Phantom flash suppressor and Q.D. sound suppressor. The hardest part to find was a non-abused original A1 buttstock - pretty hard to find good ones.
Only 100 rounds shot thru it so far, but I'm hooked!!!
You can mow down trees with 220gr round noses!