The prototype silenced Sten Mk4(S) offers surprisingly good handling due to its integrated suppressor and stock, despite a basic folding stock design. Modifications like a lightened bolt and reduced recoil spring ensure reliable cycling with subsonic 9mm ammunition fired from its ported barrel. This rare variant, compared to the issued Mk5, demonstrates effective suppression and manageable recoil, even in burst fire.
The Sten Mk4(S) was a rare 1943-1944 prototype suppressed submachine gun designed for British paratroopers. It featured a compact, folding stock design and a 3-inch barrel with vent holes to achieve subsonic velocities for better suppression. Despite its innovative features for airborne use, it suffered from poor ergonomics and was ultimately superseded by the Sten Mk5, with most units being destroyed.
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