FIELD: automatic small arms. SUBSTANCE: submachine gun with a half-free breechblock has a barrel and a breechblock casing, the breechblock casing is furnished with a permanent magnet installed in its rear part. The magnet has a central hole. The breechblock has a tail piece located in the hole of the permanent magnet. A shield is installed on the rear end of the tail piece for engagement with the magnet in the extreme forward position of the breechblock. EFFECT: simplified design, reduced dimensions and mass. 2 dwg
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