HECKLER & KOCH HK FACTORY P7M8/P7M13 FIRING PIN ASSEMBLY RARE. HECKLER & KOCH HK FACTORY P7M8/P7M13 FIRING ASSEMBLY RARE. You are viewing a Factory Heckler & Koch HK P7M8/P7M13 Firing Pin Assembly. The Firing Pin Assembly consists of the following parts. Firing Pin Collar Pin. Firing Pin Rebound Spring. Firing Pin Main Spring. (Please see the pictures, you will get what is shown in the pictures). The Firing Pin Assembly can be used for the following HK P7 Pistols. (It will NOT fit the P7 PSP or other P7’s than the P7M8/P7M13). These items would be Great to add to your Armorers tool box, for spares and to upgrade your old worn out parts. These parts are high wear items and suggested replacement parts. I also carry Many other HK P7 Parts. HK P7 Carbon Scraper Tools, P7 Brushes, P7 Take Down Tools, P7 Magazine Loaders, P7 Grip Sets, P7 Original Plastic and Cardboard boxes, P7 lanyards, P7 Patches, P7 Manuals, P7 Magazines, P7 Springs, P7 small parts etc. All winners to pay for item within 7 days of auctions end. Over 750 items in my E-Bay Store at a time! Powered by SixBit’s eCommerce Solution.