Shop › FORTIS GAS BLOCK M2 .750 SS FORTIS GAS BLOCK M2 .750 SS $52.20 Fortis Manufacturing, Inc. Gas Block, Silver, Stainless, Fits .750 Barrels LPGB-SS-M2 Quantity: Add To Cart Added! Fortis Manufacturing, Inc. Gas Block, Silver, Stainless, Fits .750 Barrels LPGB-SS-M2