The Swiss give us a super tiny PDW, the B&T TP9 / Steyr TMP
The B&T TP9, an evolution of the Steyr TMP, is a compact PDW with a unique rotating barrel system. While offering extreme compactness for roles like vehicle work, it suffers from significant gas blowback, especially when suppressed, and a poor trigger. Its ergonomics are heavily right-hand biased, and iron sights are inadequate, necessitating an optic. Reliability issues with carbon buildup during suppressed full-auto fire require frequent maintenance.









