BCM Complete Upper Receiver Assembly (BCM-UR-M4)
Built to the correct Mil-Specs.
Inside Diameter for barrel extension slightly undersized for a tighter fit to the barrel and a more accurate rifle. Please use a heat gun or hair dryer to warm up the threaded bore of the receiver if the barrel extension is too tight.
- Precision machined to correct Mil-Specs from 7075 T6 Forgings
- Fully Assembled with forward assist and ejection port cover
- Mil-Std 1913 Rail for mounting optics and accessories
- Machined for use with barrels that use an M4 barrel extension
- Laser-etched T-markings for addressing the remounting of optics
- Includes Mil-Spec Forward Assist with heat-treated tool steel pawl, with press-fit and pinned cap
- Hard Coat Anodized per Mil-A-8625F, Type III, Class2
- Dry Film Lube on interior bore per Mil-Specs
- Made in the U.S.A.
Note: Forge marking may differ from image