Started out with a Colt M16A1 parts kit,missing the barrel,disconnector and lower receiver. New Alpha Shooting Sports 20" pencil barrel,1-9" twist for versatility with ammo. New disconnector from Brownells. New Aero Precision lower receiver.They make lowers for several national companies. Other than those parts,everything is Colt. Included is 1 20 rd and 1 30 round Brownells mag. I'm looking for a Mod. 29 or 629,models without the full lug beneath the barrel. Prefer 6" but 4" would be OK. Let me know if interested.