Last year I built up a sort of retro AR--USAF no-assist 1:12 upper, A1 stock, A1 handguards, and so forth. Now I realize I've got the parts to go even a step earlier with it--early triangle charging handle, 3-prong flash, etc. Even got an early chrome no-notches carrier group! I'd need an early no-compartment buttstock. Might as well pick up a complete used set of furniture, fix it up a little, and paint it OD green like the early guns we had in the USAF. Sound like a worthwhile project? One part I will NOT retro is my A2 front sight post. The improvement of the square post over the old round one is just too good to give up.