Yankee Hill Machine AR-15 complete upper. Radical Firearms 12 inch FSG free float forend. Barrel is 16 inches long and chambered in 6.8 SPC II and is diamond fluted with an 1:10 twist. Muzzle device is (YHM) Annihilator Flash hider. (1) ASC 25rd magazine and (1) ASC 5rd magazine. Lower is a...
6.8 spc 6.8 spc ii ar-15 ar-15 upper radicalfirearms upper yankee hill machine yhm