- Precision machined to correct Mil-Specs from 7075 T6 Forgings
- Cerro MFG Upper Receiver Fully MIL-STD M4A4
- Mil-Std 1913 Rail for mounting optics and accessories
- Machined for use with barrels that use an M4 barrel extension
- 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
Our products carry a lifetime, no questions asked, warranty. Simply put... Should any of our products fail, return it to us for a brand new replacement.