Complete Upper Assemblies
304 Stainless Steel Bushing for the Osprey Defense Gas Piston Systems
Op-Rods come in Carbine Standard, Carbine Modified, Mid Length Modified, and Rifle Length Modified
Black Nitride Finished Osprey Defense Piston
AR-15, M4 & M-16 Gas Piston Semi/Fully Automatic Bolt Carrier
Black Nitride Coated Osprey Defense Piston Chamber
Piston Clip part.
Sold in a set of 2. Solid gas block retention pin (required for the Osprey Defense Gas Piston S…