The SIG MP48 is an 'economy' submachine gun developed in the 1940s to reduce production costs. Despite its design goals, it features a surprisingly instinctive progressive trigger allowing for both single shots and full-auto fire. Its compact nature, lighter weight, and unique safety mechanism (folding the magazine forward) make it a controllable and soft-shooting firearm, though its wire stock is less comfortable than traditional wood.
The SIG MP48 represents a cost-reduced evolution of earlier Swiss submachine gun designs, aiming for commercial success after military trials. It features a simplified construction with a cast receiver, a collapsing wire stock, and a unique folding magazine well acting as a safety mechanism. Despite its simplified appearance, it retains some mechanical similarities to older SIG models like the MKPS series.
The SIG 310 (MP48) represents a simplified, cost-effective evolution of SIG's earlier MK series submachine guns. Despite its compact design and a folding magazine well for transport, it offers surprisingly controllable full-auto fire at a high rate of 1026 RPM. The firearm utilizes a straight blowback, open-bolt system and features a unique retention mechanism for its charging handle.
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