Precision machined 17-4PH Stainless Steel hardened to H900 condition with a natural heat treated copper color surface finish. Our firing pin has been lightened with a series of chamfer cuts that reduce weight and retain strength. Improved sear geometry yeilds a crisper and more consistent trigger pull. Specifications for LANTAC GFP-E Upgrade Glock Firing Pin: Manufacturer: LANTAC Color: Copper Gun Model: Glock 17, Glock 19 Additional Features: Natural Heat Treated Copper Finish Gun Make: Glock Features of LANTAC GFP-E Upgrade Glock Firing Pin: Works with all 9mm .40 & 45 GAP Model Glock Pistols. Package Contents: LANTAC GFP-E Upgrade Glock Firing Pin Which weapon models is LANTAC GFP-E Upgrade Glock Firing Pin compatible with? LANTAC GFP-E Upgrade Glock Firing Pin is compatible with Glock 19, Glock 17