One of the latest advances in the military and weaponry world is the ability to 3D print ammunition. Not plastic or composite ammunition, but metal. The process is slightly different; however, the end result is the same. While this may not be the fastest way to produce ammunition, it raises the question as to who has and who can sell ammo to the masses.

https://3dprintingindustry.com/news/russian-researchers-learn-3d-print-bullets-98482/