Shop › FAXON DUTY BBL 556NATO 16" SOCOM BLK FAXON DUTY BBL 556NATO 16" SOCOM BLK $161.00 Faxon Firearms SOCOM, 1:8 Twist Barrel, 556NATO, 16", Mid Length Gas System, Fits AR-15, Nitride Finish, Black 15A58M16NSQ Quantity: Add To Cart Added! Faxon Firearms SOCOM, 1:8 Twist Barrel, 556NATO, 16", Mid Length Gas System, Fits AR-15, Nitride Finish, Black 15A58M16NSQ