3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
-
No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
-
Be respectful, especially when disagreeing. Everyone should feel welcome here.
-
No porn (NSFW prints are acceptable but must be marked NSFW)
-
No Ads / Spamming / Guerrilla Marketing
-
Do not create links to reddit
-
If you see an issue please flag it
-
No guns
-
No injury gore posts
If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
Moderation policy: Light, mostly invisible
view the rest of the comments
I'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.