Abstract: A tubular firearm in which a striker is guided in the bore of a bottom section of the cartridge chamber housing while the bottom section has a longitudinal bore therein with a chamber for receiving and storing a viscous fluid. A striker is reciprocable in the longitudinal bore and is provided with recess means while means, for instance a cam, is operatively connected to the striker for moving the same from a starting position to a striking position. The arrangement is such that when the striker occupies its starting position, the recess means are located within the region of the chamber adapted to receive and store viscous fluid. According to an embodiment of the invention, the striker is connected with an impact member through a joint having three degrees of freedom.