19 December 2025

Impro Guns has an Interesting SMG

The guns are looking better every year. Hybrid Square Tube SMG | Impro Guns

This appears to be a combination of a Professor Parabellum designed submachine gun with some 3D Printed furniture, and maybe a lower borrowed from the FGC-9.

9mm hybrid square tube submachine gun

Click thru for the photo.

The pearl-clutching, gun-fearing part of the Left is all upset about 3D printing and firearms, but really the Professor Parabellum designs, which are decades old at this point, strike me as better. Square tube for the receivers, some basic welding, and no tools more advanced than a decent drillpress are required to make some pretty nice firearms. Better than the early 3D printed stuff, though even that is getting better.

Building firearms is not rocket science. Most shadetree mechanics have the tools and knowhow to build them. That was the entire point of the Professor Parabellum designs.

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