Cal. 223. Bbl. 20". Barreled upper receiver for the Colt / Diemaco Light Machine Gun (LMG) program for the M16. Standard matte gray finish. Heavy barrel w/ integral folding bipod. 12" box style handguard retained w/ tapered delta ring. Vertical foregrip below folding carry handle. Traditional protected post front sight w/ dual aperture A2 rear peep sight. Brass deflector. No forward assist. This was intended for use on Colt machine guns w/ an open bolt firing system installed.
