Built To Withstand Continuous Fire
Ready for your next custom build, M4 A1 SOCOM Upper Receiver Assembly comes fully assembled with ejection port cover and forward assist already installed. Using superior components sure to appeal to the discerning builder, the M4A1 SOCOM Upper Receiver Assembly is topped with an FN M4A1 profile barrel, capable of standing up to sustained fire.
Made from 4150 steel, the 16" barrel has a chrome lined bore and chamber for excellent corrosion resistance and long barrel life. Chambered in 5.56 NATO, the M4A1 SOCOM Upper Receiver Assembly barrel sports the classic M4 profile with front M203 cutout to give it that traditional military appearance.
- Button broached with 1-7" twist
- Carbine length gas tube, .750” OD at gas journal
- 1/2"-28 muzzle threads
- Rock River Arms Forged Upper Receiver
- M4 feed ramps
The M4A1 SOCOM Upper Receiver Assembly comes standard with delta ring assembly, handguard cap and front sight base with sight post hardware and sling swivel. Upper receiver assembly does not include charging handle, bolt carrier group or muzzle device.