M10 (P50/M12) Pump Action Slingshot Rifle Update

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After racing back to NJ from Michigan and diving headfirst into my projects and spring cleaning, I haven’t really taken the time to post a bloggy update on my projects. I won’t rattle off all of them just yet, that’s for another day, but I do want to give a status report on where I stand in the build process for my J√∂erg Sprave-inspired apocalypse defense weapon: the M10 Pump Action Slingshot Rifle.

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Being in the United States, however, getting my hands on M10 hex nut ammunition is harder than in Bavaria. Home depot’s pricing on metric hardware is quite frankly a rip-off, so I went with the next best thing: half inch hex nuts. Although 7/16″ nuts would be a closer substitute for M10, that particular fractional size was in short supply when I went shopping. I figured I’d go big or go home.

This raises a decidedly uncommon problem, however. What do I name my creation if I can’t call it the M10 shooter? Half inch threading corresponds to 12.7mm, and neither rounding up nor down seems to produce an acceptable moniker. M12? M13? I don’t really like either, and since I’m not in metric anymore, there’s little reason to keep the “M” in the designation. So let’s use the ‘murican convention. Half inch nut = .50 “caliber”. I’m calling my creation the P-50, P standing for plywood.

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That important matter settled, I am currently drilling and shaping all the bits in the trigger group, as well as grinding/drilling/cutting all the features on the outer panels. There’s a bit of trial and error, which is why I wasn’t able to completely design the P-50 on paper before putting saw to wood. The overall form of the weapon is completed, however, so you can get a sense of the unwieldy and hilarious size of it.

Tomorrow I will be cutting out the slit for the paracord ‘sling’ to ride in, and hopefully finishing up the trigger mechanism. I expect another 2 days after that to get the theraband cut, and the slingshot forks/pump mechanism completed. Testing is optimistically slated for next week Tuesday.

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