FIELD: weapons and ammunition.
SUBSTANCE: device of chamber comprises longitudinal grooves of Revelli, which are made in the chamber and in the barrel throat in the form of a wedge of oval shape of a ring part in cross section and produce an additional effect of pushing the shell, consisting in the vector force decomposition of two bodies - the chamber housing and the shell of the cartridge, through the use of surfaces of contact inclined at an acute angle to the operating force. The longitudinal edges of the wedge-shaped grooves are rounded. For identification of firearms the shell of the spent cartridge has traces of wedge-shaped indentations.
EFFECT: improved operating conditions of weapons, increase in its reliability, protection of weapons against counterfeiting is provided.
3 cl, 5 dwg
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