However, I believe it is ok to posses information, which should include a mesh file I would think. Please seek legal advice from a practicing lawyer if you would like to download 'restricted objects' in your state, for your own benefit. I do not live or intend to live in a state that restricts the size of my plastic box with a spring, or McDonald's beverage for that matter. *** Disclaimer: I am not an attorney nor do I pretend to be one. Any thoughts? Personally, I think it could be really cool to see some interesting magazine designs, textures and accessories! You know, give Magpul R&D a run for its money :P I could see why they wouldn't like lower receivers (and why I ask not to post them in the group) but this is not as clean cut, nor illegal, even to download in a restricted state (as long as it's not actually printed)***. Of course it is the decision of the user to print the part and it is up to them to read up on laws in their area, but I'm not sure how Thingiverse would look at this. They could also design and print their own, download one from elsewhere, smuggle a factory made one from somewhere else that will probably work better, or just commit a crime with a screwdriver - but posting my design could help an unlawful Thingiverse user posses a restricted item if they were so inclined.

My design could be used as a 10 round mag, but due to the freedom associated with 3D printing or any other home fabrication technique, a user residing in one of those restricted states could potentially print one of the extensions and be in possession of an illegal magazine.

While to me, and most likely all of you in this group, a 3D printable magazine is merely one more part of the AR platform we can 3D print and show off to our buddies when we peacefully enjoy our sport, to some who haven't grown up with these fun machines and have resulting fears of the unknown, they can be scary. I just don't want to endanger this group or our beloved users and creations to the wrath of an overzealous admin. It is supposed to snap together in order to align itself properly in an innovative manner! A novel idea right?. This allows printing of any capacity desired as long as you can find a suitable spring, as well as the ability to replace a broken shell on a 30 round magazine without requiring the taller-than-regular-Makerbot Z-height on your printer to print a 30 rounder in one go. So I ordered a commie 10-rounder AR mag for bench rest shooting when I don't need all 30 rounds to get in the way and I'm debating posting my 'nth round magazine' composed of stacks of 10 round segments I made a while back.

Ar 10 3d print files