Precision machined to correct Mil-Specs from 7075 T6 Forgings
GORILLA MACHINING 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
Hard Coat Anodized per Mil-A-8625F, Type III, Class2
Dry Film Lube on interior bore per Mil-Specs
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