Between SMG and PDW: Sweden’s CBJ-MS

The CBJ-MS is a submachine gun designed by Swedish arms developed Carl Bertil Johansson, perhaps better known for his remarkable armor-piercing 6.5x25mm CBJ cartridge. He developed the gun at about the same time as the cartridge, on his own time while working at the Carl Gustafs factory in Eskilstuna. While it bears a lot of visual similarities to the Uzi, and it is an open-bolt simple blowback action, it has a unique and clever fire control system – and several other creative features as well.