Built an upper for father in law's birthday and Christmas gifts. He got a lower for father's day, gonna get a barreled assembly for his birthday, and the rest for Christmas.
I initially was going to do an A1 build fixed stock Vietnam era build, but the lower I was able to get my hands on already had a multi position stock on it and that determined the rest. Went M4 style with carry handle and adjustable sights I think M4A1? I dunno all the intricacies. Got a 16" barrel, non-railed handguard, picatinny receiver rail, bayonet lug, and a birdcage muzzle brake. Looks damn good.