Upper Receivers & Barrels

AR-15 / ZM4 Barrel Nut, Mil-Spec, by DS Arms, *NEW*

Colt 601 M16 Upper Assembly, 20" Government Profile Barrel, Bolt Assembly, A1 Birdcage, 1/7 Twist 5.56x45 NATO *Very Good*

Colt 601 M16 Upper Assembly, 20" Pencil Barrel, 3-Prong "Duckbill" Flash Hider, Gray Finish, 5.56x45 NATO *Good*

Colt 601 M16 Upper Assembly, 20" Pencil Barrel, Chrome Bolt Assy, Triangle Charging Handle, 5.56x45 NATO *Good*

Colt 601 M16 Upper Assembly, 20" Pencil Barrel, Chrome Bolt Assy, Triangle Charging Handle, Early Bend, Painted Receiver, 5.56x45 NATO *Good*

Colt 604 M16 Upper Assembly, 20" Government Profile Barrel, Slickside Bolt Assembly, No Ejection Port Cover, 5.56 NATO *Good*

Colt 604 M16 Upper Assembly, 20" Pencil Barrel, A2 Round Handguards, 1966-1968, 5.56 NATO *Good*

Colt 604 M16 Upper Assembly, 20" Pencil Barrel, Chrome Bore, A2 Handguards, 1970-1971 Production, 5.56 NATO *Good*

Colt 604 M16 Upper Assembly, 20" Pencil Barrel, Triangle Handguards, 5.56 NATO *Good*

Colt 604 M16 Upper Assembly, 20" Pencil Barrel, Triangle Handguards, Bolt Assembly, Charging Handle, 5.56 NATO *Good*

Colt 604 M16 Upper Assembly, 20" Pencil Barrel, Triangle Handguards, No Ejection Port Cover, 1969-1970, 5.56 NATO *Good*

Colt 604 M16 Upper, 20" Pencil Barrel, Chrome Bore, Cage Flash Hider, Triangle Handguards, Grey Finish 1970-1971 Production, 5.56 NATO *Good*

Colt AR-15 / M16A1 / M4 Charging Handle Assembly *NEW*

Colt AR-15 / M16A1 Receiver Extension / Buffer Tube, *Excellent*

Colt AR-15 / M16A1 Receiver Pivot Pin, Front, *Good*

Colt AR-15 / M16A1 Receiver Takedown Pin, Rear

Colt AR-15 / M4 / M16 Carbine Gas Tube (9-3/4") With Front Sight Base *NEW*

Colt AR-15 / SMG 9mm A2 Upper Receiver with Dust Cover Assembly, Muddy Girl Camo, 9x19 NATO *NEW*

Colt AR-15 / SMG 9mm A2 Upper Receiver, No Parts Fitted, Muddy Girl Camo, 9X19 NATO *NEW*

Colt LE6920EPR-CK Upper W/Bolt Carrier Assembly & Charging Handle, 16" CL 1/7 BBL, MBUS Pro, CMR MLOK Rail, 5.56X45 NATO *New in Box*