Comment on New York's 3D printer law is NOT gun control; it's just.... control.
dual_sport_dork@lemmy.world 3 weeks agoI’m not 100% certain. Possibly the Brownell’s BRN-180, although I haven’t handled one personally to see if the endstop block it comes with relies on the rigidity of the buffer tube ring to stop the bolt carrier or if it attaches to the rest of the upper itself in some way. The recoil springs are entirely captive and attached to it, at least.
I suppose you could also just reinforce the shit out of that area in your design if you knew you didn’t need to have a big hole through it.
BRN-10, Jackyl, CMMG Dissent all rely on a buffer tube ring and will crack the back of a printed AR lower.
https://hoffmantactical.com/designs/sl-15/
This will happily cycle an AR 10 upper with a buffer tube.
You have a good idea about reinforcement. Screw the endstop block into a blind hole in the back and have a monolithic lower with stock. Like a short stroke WWSD rifle.
jabberwock@lemmy.dbzer0.com 2 weeks ago
Spot on. Anything based on the AR-18 design, which begat the AR-180 semi auto civilian version (which was promptly banned), gets rid of the buffer tube function on the AR-15 to balance the BCG. It uses the dual captive recoil springs, a design that migrated to a bunch of other modern firearms.
I’ve been interested in the Aly & Kaufman AKB-23, basically a L85/SA80 replica lower that you throw a BRN-180 on and add some furniture to complete the look. So short version, yeah I think you could whittle a wooden lower for AR-18 style uppers. Probably only get a few shots off before it cracked though, wood can be quite brittle like that.