This pack of 5 Rival Arms Firing Pin Channel Liners is perfect for a factory replacement, or a new build. Keep your Glock running with these quality, aftermarket parts! Model fit includes the Glock 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38 and 39. 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.