[The Great RJ]

They remind me of the M3 “Grease Gun” sub machine gun used in WW-II. The M3 was simply made of stamped steel parts and undoubtedly a similar gun could be produced in quantity in small workshops.

[marktwain]

The most difficult part of a sub-machine gun to make is a reliable magazine.

It was demonstrated, a few months ago, that difficult part of reliable magazines to make, the body and follower, can be easily printed on 3-D printers. After all, magazines bodies are just a box of reasonably precise dimensions, and the follower is just a small part. Springs are widely available on the open market.

Everything else is pretty easily available. The steel used for submachine gun barrels can just be ordinary steel. Heat treating could be desirable, but not necessary.

[HammerT]

Gun grabbers like to pretend that guns are very complicated and mysterious devices that cannot be made by criminals, and therefore they can perpetuate the myth that taking away the people’s commonsense civil right of armed self-defense will somehow keep them safe.

When in fact, criminals can make guns – and their people control only inconveniences them slightly.

While at the same time giving them a playing field where they hold all the advantages of an unarmed populace.