“Homemade” gun? One more reason why gun control is silly.
The first firearms can be traced back to 10th century China. The Chinese were the first to invent gunpowder, and historians typically credit the first guns as being weapons the Chinese called fire lances.
The fire lance was a metal or bamboo tube attached to the end of a spear. The tube was filled with powder and shrapnel, which was then set off at the beginning of a battle to try and gain an advantage. It worked like a combination of a flamethrower and a shotgun, expelling flames and pellets at the enemy target. Fire lances gradually became closer in concept to shotguns as powder improved.
https://www.ammunitiondepot.com/blog/gun-history-when-was-the-first-gun-made#:~:text=The%20first%20firearms%20can%20be,the%20end%20of%20a%20spear.
Do a search on “Luty”. Name of a British guy who tried to show how worthless gun control was by building a submachine gun from stuff at the local hardware store and common tools.