Shadow Systems Firing Pin Safety Assembly. We believe reliability is paramount. Therefore our firing pin safety is machined to exactly match the weight and dimensions of a stock firing pin safety to ensure it goes bang every time. For 9mm G17G19 G25 G26 G34 Gen 3/4 This part has been redesigned for improved trigger pull. This is the version currently used in the MR920 DR920 and XR920 pistols. Fits all 9mm Gen 1-4 except 42 43 Heat treated 17-4 stainless steel with Nickel Teflon coating firing pin safety Standard weight firing pin spring Specifications for Shadow Systems Firing Pin Safety Kit fits Glock Pistsol: Manufacturer: Shadow Systems Color: Stainless Steel Fabric/Material: 17-4 Stainless Spring Gun Make: Glock Additional Features: Firing Pin Spring Gun Type: Pistol Package Contents: Shadow Systems Firing Pin Safety Kit fits Glock Pistsol Shadow Systems SGK-1007: Firing Pin Safety Assembly