A firearm for firing case-telescoped (CT) rounds includes a barrel configured for transit of a bullet of a live CT cartridge in a live-fire operating mode. The live CT cartridge is chambered and fired from a live-fire chamber installed in the live-fire operating mode. The firearm further includes a blank-fire chamber configured to chamber and fire a blank CT cartridge in a blank-fire operating mode, wherein the blank-fire chamber has a second diameter less than a first diameter of the live-fire chamber, to prevent chambering of the live CT cartridge in the blank-fire operating mode. The arrangement can enhance safety by preventing accidental firing of a live round during operation when it is assumed that only blanks are being fired.

A sub-mass projectile for a standard, unmodified firearm, comprising a core formed from a malleable core material with at least a portion of the core material being a non-metal material. The core has a lower mass than a standard projectile for the standard, unmodified firearm. An outer surface associated with the core has a diameter that is sized less than an outer diameter of a standard cartridge and larger than an inner diameter of a standard, unmodified barrel bore of the standard, unmodified firearm such that the outer surface associated with the core contacts the inner diameter of the standard, unmodified barrel bore to generate forces in the firearm that approximate operational forces of a standard mass projectile on the standard, unmodified firearm during operation.

A barrel for a handgun includes an imaginary barrel bore axis along which it extends in the x-direction, around which barrel axis the following are formed in the interior of the barrel, in succession from a rear end to a front end: a cartridge chamber, which has a first diameter; a cartridge chamber opening, which has a second diameter; a conical transition, which transitions from the second diameter to a third diameter, which is associated with the guide region; and a barrel opening, an end face being formed around the cartridge chamber opening, and the barrel being suitable for a bullet driven by hot gases to accelerate therethrough. The end face is at least 1.5 times larger than the cross-sectional surface formed by the third diameter.

For an externally powered weapon, in particular a machine weapon and a machine gun, having at least one barrel, a recoil intensifier at the front end of the barrel is proposed to intensify a weapon return of the returning masses of the weapon and to generate and intensify a signal for monitoring, in particular functionally monitoring, the weapon. The recoil intensifier is of a flared form. The signal intensified by the intensification is used for example for counting the number of shots fired, initiating an emergency stop function, etc. Depending on the further use, the mechanically intensified signal may be converted into an electrical signal.

For an externally powered weapon, in particular a machine weapon and a machine gun, having at least one barrel, a recoil intensifier at the front end of the barrel is proposed to intensify a weapon return of the returning masses of the weapon and to generate and intensify a signal for monitoring, in particular functionally monitoring, the weapon. The recoil intensifier is of a flared form. The signal intensified by the intensification is used for example for counting the number of shots fired, initiating an emergency stop function, etc. Depending on the further use, the mechanically intensified signal may be converted into an electrical signal.

A Reciprocating Slide Device for use with a semi-automatic pistol or rifle, which will simulate the action of the firearm by use of an electromagnet upon user activation of the trigger, and a spring that reciprocates the slide in order to reset the trigger thereafter.

A Reciprocating Slide Device for use with a semi-automatic pistol or rifle, which will simulate the action of the firearm by use of an electromagnet upon user activation of the trigger, and a spring that reciprocates the slide in order to reset the trigger thereafter.

A sub-mass projectile for a standard, unmodified firearm, comprising a core formed from a malleable core material with at least a portion of the core material being a non-metal material. The core has a lower mass than a standard projectile for the standard, unmodified firearm. An outer surface associated with the core has a diameter that is sized less than an outer diameter of a standard cartridge and larger than an inner diameter of a standard, unmodified barrel bore of the standard, unmodified firearm such that the outer surface associated with the core contacts the inner diameter of the standard, unmodified barrel bore to generate forces in the firearm that approximate operational forces of a standard mass projectile on the standard, unmodified firearm during operation.

A sub-mass projectile for a standard, unmodified firearm, comprising a core formed from a malleable core material with at least a portion of the core material being a non-metal material. The core has a lower mass than a standard projectile for the standard, unmodified firearm. An outer surface associated with the core has a diameter that is sized less than an outer diameter of a standard cartridge and larger than an inner diameter of a standard, unmodified barrel bore of the standard, unmodified firearm such that the outer surface associated with the core contacts the inner diameter of the standard, unmodified barrel bore to generate forces in the firearm that approximate operational forces of a standard mass projectile on the standard, unmodified firearm during operation.

A sub-mass projectile for a firearm includes a core having a relatively lower mass than a standard projectile for the firearm. A force inducer is associated with the core. The force inducer has an interface that interacts with the firearm. The interface includes a bearing surface with a relatively larger outer diameter than a standard projectile for the firearm. The bearing surface bears against a surface of the firearm during operation so as to increase resistive forces between the sub-mass projectile and the firearm to a magnitude sufficient to approximate the kinetic forces of a standard mass projectile on the firearm during operation.