The PSS is a unique Russian captive-piston handgun developed for special operations, utilizing SP4 ammunition to achieve silence. Despite its innovative design, it features poor ergonomics and a complex floating chamber mechanism for cycling. While quieter than conventional firearms, it's not perfectly silent, and its utility is questioned compared to modern suppressed pistols, though its successor, the PSS-2, offers improvements.
The Russian PSS is a unique semi-automatic handgun utilizing captive-piston ammunition (SP-4) for extreme sound suppression. This system seals propellant gases within the cartridge case, but minor leakage results in a report similar to a suppressed .22LR. Its design incorporates a high cartridge feed to manage wadcutter-style projectiles, though it requires significant mechanical compromises and is not truly silent.
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