Patent ID: 6978709

Claim:
A breech device for bolt-action firearms, the breech device comprising a breech body and a magazine, the magazine is removable and comprises an outer casing that defines a containment area for containing multiple unconnected cartridges, the breech body reciprocating in a receiver and being rotatable into a position wherein the breech body is locked with respect to the receiver in a position for firing, the breech body having in its front portion at least three locking lugs located in three sectors, the locking lugs in at least two of the three sectors arranged adjacent an outlet end of the magazine and together having four guide surfaces for acting against the receiver to limit rotation between the receiver and the breech body, and the breech body has a recessed cartridge locking surface at an end of the breech body, wherein the cartridge locking surface includes a glide surface portion extending between the at least two locking lugs and into an outlet end of the magazine so that during use a rear surface of a cartridge ejected from the magazine slides on the glide surface and the locking surface into a position where the cartridge is locked with respect to the breech body, as the cartridge is ejected from the magazine.