Lone Wolf Maritime Spring Cups are a great upgrade to your tactical Glock pistol. These marine spring cups will fit all Glock models and allow water and debris to drain from the firing pin channel after being submerged. The polymer cups will take years of rigorous use without fail. If your Glock must operate in the harshest of environments, this may be the most important upgrade available.DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.