Griffin Armament 3L1351LHSIG Features The Griffin Armament 3L1351LHSIG is machined from stainless steel a material chosen for its strength and resistance to the heat and fouling that build up around a muzzle device during extended shooting sessions. The 13.5x1 LH thread pattern matches a specific left-hand threaded 9mm barrel so fitment is precise rather than a universal compromise. Because the thread direction is left-hand this piece is intended specifically for hosts machined to that same reversed pattern preventing cross-threading onto a standard right-hand barrel. Griffin Armament builds its mounting hardware to tight tolerances so the fit stays consistent and secure through repeated use. The Melonite QPQ finish applied over the stainless steel base adds a layer of surface hardness and corrosion resistance beyond what bare stainless offers on its own. That finish also reduces friction during installation and removal helping prevent the threads from binding or galling over time. Stainless steel construction means the part resists the moisture and powder residue that accumulate near the muzzle without requiring special upkeep. For a 9mm shooter running a left-hand threaded host this mount is a straightforward way to get a correctly matched durable connection point for suppressor use. Griffin Armament 3L1351LHSIG Specifications Manufacturer: Griffin Armament Caliber: 9mm Material: Stainless Steel Finish: Melonite QPQ Thread Pattern: 13.5x1 LH Available At: GrabAGun