The Polish PM63 Rak is reviewed as a machine pistol with significant ergonomic and operational flaws. Its reciprocating slide ejects debris, and the sights are difficult to use due to movement. The progressive trigger makes semi-automatic fire challenging, often leading to unintended full-auto bursts. Compared to other machine pistols like the Skorpion, the PM63 is ranked lower due to poor handling and distracting mechanics.
The PM63 Rak is a unique Polish PDW/SMG hybrid designed by Peter Wilniewczyc, featuring an unusual open-bolt slide and a progressive trigger for semi-auto and full-auto fire. Its name 'Rak' translates to 'Cancer' in Polish, referencing its design origins and the designer's illness. The weapon incorporates a distinctive muzzle 'spoon' deflector for one-handed cocking and an inertial rate reducer to manage its high cyclic rate.
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