A hammer usable with a firearm having a bolt carrier that is configured to travel forward and rearward within the firearm during a firing operation of the firearm. The hammer includes a mounting portion configured to rotatably constrain the hammer within the firearm and a firing pin contact portion configured to rotate upward to a vertical most position and contact a firing pin. The hammer further includes a sear notch configured to contact a trigger, and an extended surface that is configured to contact a bottom portion of the bolt carrier when the bolt carrier travels in a rearward direction after firing of the firearm. The extended surface allows for additional travel of a bolt carrier group of the firearm.

A hammer usable with a firearm having a bolt carrier that is configured to travel forward and rearward within the firearm during a firing operation of the firearm. The hammer includes a mounting portion configured to rotatably constrain the hammer within the firearm and a firing pin contact portion configured to rotate upward to a vertical most position and contact a firing pin. The hammer further includes a sear notch configured to contact a trigger, and an extended surface that is configured to contact a bottom portion of the bolt carrier when the bolt carrier travels in a rearward direction after firing of the firearm. The extended surface allows for additional travel of a bolt carrier group of the firearm.

A recoilless firearm apparatus for firing at least one bullet of a respective standard cartridge, including a front barrel, a disposable firing activator and a rear discharge opening formed behind the front barrel and aligned with the longitudinal axis of the front barrel. The standard cartridge further includes a casing having an external diameter that is smaller than the rear cartridge-chamber diameter, wherein the casing encloses a sealed inner-casing space that contains gunpowder, and wherein the casing includes a primer. Upon activating the primer, the primer explodes to thereby detonate the gunpowder, forming propellant gasses inside the cartridge that are directed both forward and backward as follows: a) forward: firing of the bullet via the front barrel; and b) backward: pushing, by a recoil force F.sub.p, the casing, being a counterweight to the bullet, to thereby eject the casing from the firearm apparatus via the rear discharge opening.

New systems, devices and methods for extremely precise aiming and shooting of firearms are provided. In some embodiments, predicted projectile impacts may be selected and adjusted, prior to execution. In some embodiments, a device including specialized computer hardware and software aids a user in planning a shot(s), evaluating the accuracy of the planned shot(s), adjusting the location of the planned shot(s), and executing the planned shots. In some embodiments, smart bullets with on-board electronics, active aerodynamics, and wireless communications capabilities adjust a flight path of the smart bullet in-flight, to match a selected target location and/or flight path. In some embodiments, an active firearm barrel may counteract and/or otherwise adjust for any other relevant ballistic and other accuracy-impacting factors with a position-actuable firing mechanism to maintain a projected flight path of such a point of impact.

A system that allows a person to adjust the tension of the fire control mechanism of a firearm from outside the firearm so the firearm does not need to be disassembled to make such adjustments. The system has a modified mainspring housing that supports one or more spring engaging mechanisms which engage the sear spring of the fire control mechanism. In one configuration, first and second apertures extend through the housing body and an engaging device, such as a screw, is received in each aperture to contact different segments of the sear spring. From outside the firearm, the user moves the devices forward or rearward in the apertures to apply more or less force to the subject sear spring segment to adjust the tension of the fire control mechanism. The sear spring is modified so each engaged segment has an enlarged area that is contacted by its engaging device.

Gun comprising a gun frame, a barrel supported by the gun frame, a slide, translatable longitudinally in relation to the barrel, and at least a hammer, rotatably mounted with respect to the gun frame so as to move at least a firing pin of said gun towards the barrel. A centreline plane crosses said gun between opposite gun flanks, and the rotation axis of said hammer lies in the centreline plane or is substantially parallel to said plane.

Gun comprising a gun frame, a barrel supported by the gun frame, a slide, translatable longitudinally in relation to the barrel, and at least a hammer, rotatably mounted with respect to the gun frame so as to move at least a firing pin of said gun towards the barrel. A centreline plane crosses said gun between opposite gun flanks, and the rotation axis of said hammer lies in the centreline plane or is substantially parallel to said plane.

Trigger assemblies that preserve the integrity of the trigger sear surface when the trigger assembly enters a half-cocked, safety configuration are disclosed. In certain embodiments, a trigger safety engagement surface engages a hammer safety engagement surface in the safety configuration, preventing the hammer from rotating into contact with a firing pin. In some instances, the trigger sear surface is suspended within a safety recess (e.g., a notch) of the hammer and free of contact with the hammer when the trigger assembly is in the safety configuration.

Trigger assemblies that preserve the integrity of the trigger sear surface when the trigger assembly enters a half-cocked, safety configuration are disclosed. In certain embodiments, a trigger safety engagement surface engages a hammer safety engagement surface in the safety configuration, preventing the hammer from rotating into contact with a firing pin. In some instances, the trigger sear surface is suspended within a safety recess (e.g., a notch) of the hammer and free of contact with the hammer when the trigger assembly is in the safety configuration.

Trigger assemblies that preserve the integrity of the trigger sear surface when the trigger assembly enters a half-cocked, safety configuration are disclosed. In certain embodiments, a trigger safety engagement surface engages a hammer safety engagement surface in the safety configuration, preventing the hammer from rotating into contact with a firing pin. In some instances, the trigger sear surface is suspended within a safety recess (e.g., a notch) of the hammer and free of contact with the hammer when the trigger assembly is in the safety configuration.