AUTOMATIC GUN WITH BARREL COOLER Russian patent published in 2010 - IPC F41A13/10 F41C3/00 

FIELD: weapons and ammunition.

SUBSTANCE: automatic gun consists of barrel, breech frame and carrier block. Proposed gun comprises barrel cooling device consisting of housing representing tube with outer case arranged aligned with the barrel. Note here that outer case diametre, tube ID and barrel diametre are related as at least 6:3:1. Piston with spring is arranged inside barrel to move therein. Spring-loaded valve is arranged at the housing rear end to translate therein. Housing front end accommodates valve that moves crosswise. Tube surface have holes arranged on housing front part. Said piston and crosswise valve are arranged to lock the latter by piston ledge in piston front position, while said valve can shut off inner tube bore.

EFFECT: reduced weight, higher fire power, ease of use.

1 dwg