Abstract: A hinge device for break-open type firearm comprises two pair of arcuate ridges on the breech slidably received in complementary grooves formed in parallel sidewalls of a receiver. One pair of ridges and complementary grooves is located forwardly of the hinge axis, with one ridge and its associated groove on each side of the ridge, and the other pair of the ridges and complementary grooves is located rearwardly of the hinge axis. In the closed position of the firearm, the ridges and grooves are generally upright, so that their flanks or sidewalls include a large angle with the line of action of the recoil forces.

Abstract: Ejector device for a firearm, the action of which is opened by tilting about a hinge interconnecting the barrel and the receiver. A spring-urged cartridge ejector (19) is latched in cocked position by an ejector latch plunger (35) which is displaceable by the mechanical pressure exerted by the outer side of a fired cartridge to move from a non-latching inner position to an outer position latching the cartridge ejector (19). From the outer position, the plunger is moved back to the inner position by camming interaction of the outer plunger end (35b) and the receiver sidewall (15) upon tilting the firearm to fully open or substantially fully open the position of the action.