Gre-Tan Rifle's GEN II Lite steel Firing Pin Assembly; Matte Black. Featuring the Thread Assembly System that prevents the uncontrolled discharge of the firearm. This thread assembly joins in front of the spring collar. Along with a Radius Tip contour design so you can now dry fire practice and set triggers with our pin. The pin is made with 7075-T6 aluminum shank, and preheat treated 4140 Steel tip. If you are purchasing a GTR Firing Pin Assembly for a PTG bolt it needs to be fitted by Gre-Tan. Contact Gre-Tan and they will install and fit it for free. Mfg: Gre-Tan