The LANTACT Firing Pin Safety has been lightened with a series of chamfer cuts that reduce weight and retain strength. Improved sear geometry yields a crisper and more consistent trigger pull. Precision machined 17-4PH stainless steel hardened to H900 condition with a natural heat treated copper color surface finish. Works with all 9mm, .40 and 45 GAP model Glock pistols. Fits: 17, 19, 22, 23, 24, 26, 27, 31, 32, 33, 34, 35, 37, 38, 39 Gen 1, 2, 3, 4 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.