Abstract: A bayonet-connector-like breech lock has a breech housing and a breech block with at least two radially projecting locking components. The enlarged region needed to rotate the locking components takes the form of an annular space wherein a locking sleeve is fitted to rotate between an open and a locked end position. The locking sleeve has a widened section for each locking component aligned with a widened part of the breech block bore in the open end position. The annular space is completely filled by the locking sleeve and the pushed-in breech block.

Abstract: Described is a mount for a telescopic sight. The mount has two pairs of spaced engaging elements which can be locked to each other. A spring-biased bolt mounted in a carrier element is displaced by means of an elbow or toggle lever and braces one pair of the spaced engaging elements against the other pair.

Abstract: A device for sealing the cartridge chamber of a small arms weapon that fires a caseless cartridge consisting of a propellant charge and a bullet that is connected to the propellant charge. The device includes a pot-shaped seal having a base and a side. The seal is disposed on the weapon's butt front edge so that at least a portion of the side's outer surface presses on an adjacent inner surface of the cartridge chamber when the butt is closed. The outer surface further sealingly engages the chamber adjacent inner surface in response to the gas pressure from the propellant charge when the cartridge is fired. The side's outer surface is defined by a first generatrix that is parallel to the chamber axis and the adjacent chamber inner surface is defined by a second generatrix, where the first and second generatrices converge.