cbj-ms

The CBJ-MS (Modular System) is a submachine gun of Swedish origin. Designed and manufactured by Swedish weapon developer CBJ Tech AB, and was also manufactured by Saab Bofors Dynamics. It can be chambered for both 9×19mm Parabellum and higher-velocity "6.5×25mm CBJ":[https://en.wikipedia.org/wiki/6.5×25mm_CBJ] ammunition via simple barrel changes.