Na they have materials to 3d print receivers. Here is a link to the most common material types used. (Not sure why the url calls for suppressors the article is about lower receivers.)
I don’t think you are going to be able to fire off 100rd drum magazines out of a 3d printed AR receiver but they definitely work, I’ve shot one with 30rd magazine. It was like anyother gun, the barrel was hot but the receiver and body were seemingly unaffected.
Na they have materials to 3d print receivers. Here is a link to the most common material types used. (Not sure why the url calls for suppressors the article is about lower receivers.)
I don’t think you are going to be able to fire off 100rd drum magazines out of a 3d printed AR receiver but they definitely work, I’ve shot one with 30rd magazine. It was like anyother gun, the barrel was hot but the receiver and body were seemingly unaffected.