Abstract: A hammer assembly of the automatic mechanism of a firearm, comprising a breech (4) that is pushed towards the barrel (3) by a return spring (6). On the breech (4) and/or in the breech case (3) a hammer carrier (10) is arranged in a sliding way that is pushed towards the breech by a striking spring (13). The hammer carrier (10) carries a hammer (11). The hammer (11) is arranged on the hammer carrier (10) movably between the front end position and the rear end position wherein between the front and rear end positions of the hammer (11), there is a play (F). The hammer (11) is pushed to the front end position by the hammer spring (12).

Abstract: A single shot firearm includes a barrel and a receiver assembled together and being rotatable relative to one another between a safety position, in which a firing assembly is prevented from moving forward far enough to allow a firing pin to strike a cartridge, and a firing position, in which a notch on the barrel allows the firing assembly to the move forward far enough to strike and discharge the cartridge. The firearm includes indicia on the barrel and receiver which indicate whether the firearm is in a safety position or a firing position, depending on their relative rotational positions. The firearm further includes a trigger guide which facilitates firearm discharge by a single smooth motion of the user's finger.

Abstract: The present invention relates to a small-calibre defence system, characterised by the use of an unconventional process, with the following main characteristics: the absence of a trigger and hammer, which are replaced by firing mechanisms in the form of a handle (B) inside which the percussion system (C) is activated by rotating it in relation to the barrels (E), thus forcing the striker to move up a ramp thereby compressing the tensor system, after which it is released and the firearm is detonated, this merely being an example of what the invention covers; the novelty of its design, which has been devised in order to make it difficult or impossible for a child to activate it; it is assembled longitudinally in multiple barrels (E), with a manually tightened rotating safety lock (D), contrary to the buttons and catches of similar firearms; it has a integrated Progressive Impact Area Indicator laser sight (F) which functions progressively according to distance; and it has a foldaway grip (G).