“The right of citizens to bear arms is just one guarantee against arbitrary government, one more safeguard against the tyranny which now appears remote in America, but which historically has proved to be always possible.” — Senator Hubert H. Humphrey (D-MN)
Thursday, August 2, 2018
Army Manual Improvised Weapons & Munitions TM 31-210
The manual you are looking for isTM 31-210. Section 3 has directions to make pistols and shotguns out of materials you can purchase in a hardware store.
Buying a 3D printer, downloading and configuring the software, and printing a plastic single shot pistol is time consuming and expensive.