Czech Sa vz. 26 SMG

The Czech Samopal vz. 26 was one of a family of submachine guns (the vz 23-26) that pioneered the use of bolts telescoped out forward over the barrel, allowing guns to have much better ratios of barrel to receiver length than before. The guns actually have quite a few interesting mechanical details, although in my opinion they fail to make it a particularly desirable gun for actual shooting.