Just an update on my 3D printed falling block rifle. I had a question on how strong the 3D printed barrel threads will be, or how much force it would take to blow the barrel forward out of the receiver. Someone much smarter than me did the math on the thread shear strength using the rough numbers for PLA, and came up with a minimum of 6,815 lbf, with "ideal" threads giving me 13,583 lbf. That's well over the amount of force that the DAG training ammo can generate.
I think I've got my design far enough along that I can make a test print. I'm not sure what I want to do with the top of the handguard. I don't really want a top handguard, but it looks like it's missing something without it. I can't make the front of the receiver smaller or longer because of the barrel nut. I like the Space Cowboy look, so I might end up with some sort of optic mount(my Savage Axis barrel doesn't have a front sight on it anyway).
interesting design. I like your project
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