GFP-E Glock Firing Pin Enhanced is precision machined 17-4PH Stainless Steel hardened to H900 condition with a natural heat treated copper color surface finish. The firing pin 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.Features :Fits G17 & G19 onlyPrecision machined 17-4PH Stainless SteelManufactured in the USA