means of a bolt handle with which is associated a first cam element that is arranged so that it can rotate in the lock guide with a rear contact surface for support against a fixed control element to allow especially smooth running and safe locking action a second cam element which can rotate independently of the first cam element and that has a rear control cam for support against the fixed control element is associated with the locking lever application_number US 48010309 A description in fig1 the rear part of a barrel 1 and a breech 2 of a repeating rifle in a locked position are shown on its rear end the barrel 1 has a cartridge holder 3 and a locking head 4 with a locking groove 5 on the inner wall of a receiving hole 6 the breech 2 contains a lock guide 7 that is constructed as a slide and that is guided so that it can move on a receiver 8 shown partially in fig2 and 3 by means of side longitudinal guides 9 the breech 2 further contains a locking sleeve 10 that is constructed here as an expansion sleeve and that is arranged in a hole 11 expanded frontwards with a step shape in the lock guide 7 and that contains at its front.