Shop › BAD WH LOW PRFLE GAS BLCK .750 BLK BAD WH LOW PRFLE GAS BLCK .750 BLK $34.99 Battle Arms Development Workhorse Low Profile, Gas Block, .750, Matte Finish, Black, Includes Set Screws WH-GB-750 Quantity: Add To Cart Added! Battle Arms Development Workhorse Low Profile, Gas Block, .750, Matte Finish, Black, Includes Set Screws WH-GB-750