Gas tube - Carbine Length Gas Tube Stainless Steel AR15 223 5.56

AR15 223 5.56 AR M4 Carbine Length Gas Tube Stainless 9.75" +stainless Gas Block Steel Gas Tube Stainless Steel Construction Comes with Roll Pin Pins into front sight or gas block Low Profile...

AR15 223 5.56 AR M4 Mid-Length Gas Tube Stainless 11.75" +stainless Gas Block Steel Gas Tube Stainless Steel Construction Comes with Roll Pin Pins into front sight or gas block Low Profile Gas...

AR15 223 5.56 AR M4 Rifle-Length Gas Tube Stainless 15.25" +stainless Gas Block Steel Gas Tube Stainless Steel Construction Comes with Roll Pin Pins into front sight or gas block Low Profile Gas...

AR15 223 5.56 AR M4 Carbine Length Gas Tube Stainless +Gas Block Aluminum Gas Tube Stainless Steel Construction Comes with Roll Pin Pins into front sight or gas block Low Profile Gas Block for Model...

AR15 223 5.56 AR M4 Pigtail Pistol Length Gas Tube Stainless Steel + Steel gas block Gas Tube Stainless Steel Construction Comes with Roll Pin Pins into front sight or gas block Gas tube for...