Shop › FAXON DUTY BBL 300BLK 16" GNNR BLK FAXON DUTY BBL 300BLK 16" GNNR BLK $165.60 Faxon Firearms Duty Series, Gunner, 1:8 Twist Barrel, 300 Blackout, 16", Carbine Length Gas System, Fits AR-15, Nitride Finish, Black 15A38C16NGQ Quantity: Add To Cart Added! Faxon Firearms Duty Series, Gunner, 1:8 Twist Barrel, 300 Blackout, 16", Carbine Length Gas System, Fits AR-15, Nitride Finish, Black 15A38C16NGQ