Shop › BALLISTIC .750" LO-PRO GAS BLOCK BALLISTIC .750" LO-PRO GAS BLOCK $28.50 Ballistic Advantage Low Profile Gas Block, Fits AR15, .750", Melonite Finish, Black BAPA100013 Quantity: Add To Cart Added! Ballistic Advantage Low Profile Gas Block, Fits AR15, .750", Melonite Finish, Black BAPA100013