Shop › BAD WORKHORSE 13" MLOK RAIL BLK BAD WORKHORSE 13" MLOK RAIL BLK $159.00 Battle Arms Development 13" Workhorse Rail, MLOK, Free-Float, Fits AR Rifles, Black BAD-WH-13-MLOK Quantity: Add To Cart Added! Battle Arms Development 13" Workhorse Rail, MLOK, Free-Float, Fits AR Rifles, Black BAD-WH-13-MLOK