The Colt AR15A4/M16A4 Barreled Upper Assembly is used on current issue M16A4 model rifles as well as civilian AR15A4 model rifles. The barrel is Colt's standard 20" chrome lined M16 barrel with an A2 front sight post ("F" height) and A2 flash hider. This is a new upper receiver group, taken off a full Colt rifle. Ships in military grade plastic with Colt oil on the barrel and receiver and BCG, in non-factory box. 100% all Colt, factory assembled.
Note: Stock pictures do not show the bolt carrier group and charging handle, but both are included.
Colt Part Number: M16A4-SUR