The ZEV Technologies Firing Pin Channel Liner will lessen the firing pin spring and spring cup wear and eliminate the need for lubricant. ZEV makes everything you need to keep your ZEV or OEM slide operating at peak level. Zev designs, engineers, manufactures and tests every part they make in house. 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.