There are now available the information you need to use AR 15 parts and the materials you need to build it. Some of it is 3 d printed parts to make a Gatling gun. Have no intention of doing so but it is fun to read about. [SHOT 2026] Automatic For The People: Now You Can DIY A Gatling Gun And the blog with the information. m1337_materials - Nopel And here is a source for a kit that has the materials and hard parts. M1337 Complete Kit - 3D Print Freedom M1337 Archives - 3D Print Freedom While it may seem expensive, I think the kit contains the 6 barrels and the bolts as well. The 3d print people have some very interesting other gun projects Well worth looking into just to see what is being done. Not into 3d printing so it may be old hat, but it was new to me. This information is posted as a topic of interest. You will have to determine the legality of down loading any files in your state. I do not own these files and take no credit or responsibility for their use.