Shop › ODIN WORKS .875 LOW PRO ADJ GAS BLCK ODIN WORKS .875 LOW PRO ADJ GAS BLCK $84.55 Odin Works Adjustable Low Profile Gas Block, Fits .875" Diameter Barrels, Nitride Finish, Black GB-ADJ-.875 Quantity: Add To Cart Added! Odin Works Adjustable Low Profile Gas Block, Fits .875" Diameter Barrels, Nitride Finish, Black GB-ADJ-.875