In a gas-operated mechanism, a portion of the combustion gases propelling the bullet within the barrel are diverted and used to unlock the bolt and cycle the action rearward.

The self-powered version, the GAU-4 ( called M130 in Army service ), is gas-operated, tapping gun gas from three of the six barrels to operate the mechanism.

The SVT series used a simple gas-operated mechanism, which was soon emulated by Walther in the G41 ( W ), producing the Gewehr 43 ( or G43 ).

The semi-automatic mechanism is gas-operated through the direct impingement system.

While the HS. 404 resembled the parent Oerlikon FF S in many respects, its repeating mechanism was gas-operated.

" The RFB is a gas-operated semi-automatic rifle with tilting breech block locking mechanism, loads the 7. 62 × 51 NATO cartridge and uses metric FAL magazines ; the RFB " family " consists in a series of Bullpup rifles with three barrel lengths ( 18 " barrel carbine, 24 " sporter and 32 " target versions ), and a patented forward-ejection system via a tube placed over the barrel that ejects the spent case forwards, over the handguard of the rifle.

In a gas-operated gun, the bolt is accelerated rearwards by propellant gases during firing, which results in a forward force on the body of the gun.

A last minute gift from a wealthy donor were a pair of modern tripod mounted, gas-operated M1895 Colt-Browning machine guns in 7mm Mauser caliber.

This system is in contrast to the more common type of gas-operated system, in which gasses are tapped off from the barrel, and push back on a piston to open the breech to the rear.

The R4 is a selective fire, gas-operated weapon that fires from a closed bolt.

The GSh-6-23 differs from most American multi-barreled aircraft cannon in that it is gas-operated, rather than externally powered via an electric, hydraulic, or pneumatic system.

* SLP ( Self-Loading Police ): 12-gauge gas-operated semi-automatic shotgun offered in four different models with various barrel lengths, sight options, and capacities.

The SVT-38 is a gas-operated weapon with a short-stroke, spring-loaded piston above the barrel and a tilting bolt.

Mechanical malfunctions of the firearm are generally referred to as " jams ", and include failures to feed, extract, or eject a cartridge ; failure to fully cycle after firing ; and failure of a recoil-or gas-operated firearm to lock back when empty ( largely a procedural hazard, as " slide lock " is a visual cue that the firearm is empty ).

For example, gas-operated shotguns are widely held to have a " softer " recoil than fixed breech or recoil-operated guns.

The M4 and its variants fire 5. 56 × 45mm NATO ammunition ( and. 223 Remington ammunition ) and are gas-operated, magazine-fed, selective fire firearms with either a multi-position telescoping stock or a fixed A2 or LE tactical stock.

Although the engineering difficulties involved in producing a gas-operated rotary cannon with such a high rate of fire are considerable, they create less of a drain on the aircraft's power systems, and they accelerate to their maximum rate of fire much more quickly.

The proposed system of operation was modeled on that used in the World War I Lewis light machine gun, with a gas-operated turning bolt action geared to a spiral ( clock-type ) recoil spring.

Although initially fitted with a synchronizer, the irregular rate of fire afforded by the gas-operated Hotchkiss machine gun he used meant it didn't work half the time, and he was reduced to fitting metal plates to armour the propeller.

The cannon has 10 pyrotechnic cocking charges, similar to those used in European gas-operated revolver cannons such as the DEFA 554 or Mauser BK-27.

A pyrotechnic cocking charge is a device used to cock or re-cock a gas-operated automatic cannon, such as the Mauser BK-27 or the Gryazev-Shipunov GSh-6-23.

However, the much lighter total weight possible by using recoil to power automatic loading was not lost on the firearms designers of the day, resulting in other automatic firearms that used this concept, such as the Borchardt pistol, the Cei-Rigotti rifle, the Madsen 1902, as well as lighter, gas-operated, air-cooled designs.

The SKS is a gas-operated weapon that has a spring-loaded operating rod and a gas piston rod that work the action via gas pressure pushing against them.

Unlike conventional gas-operated firearms, direct impingement does away with a separate gas cylinder, piston, and operating rod assembly.

In December 1914, French aviator Roland Garros asked Saulnier to install his synchronization gear on Garros ' Morane-Saulnier Type L. Unfortunately the gas-operated Hotchkiss machine gun he was provided had an erratic rate of fire and it was impossible to synchronize it with a spinning propeller.

After the Gatling gun was replaced in service by newer recoil-or gas-operated non-rotating machine guns and automatic cannons, the approach of using multiple rotating barrels fell into disuse for many decades, reappearing after World War II with the development of the M61 Vulcan.

In 1944, he designed a gas-operated carbine for the new 7. 62x39 mm cartridge.

The M16 is a lightweight, 5. 56 mm, air-cooled, gas-operated, magazine-fed assault rifle, with a rotating bolt, actuated by direct impingement gas operation.

The rifle retained the use of the same 7. 62x54R ammunition, but is a semi-automatic gas-operated rifle with a detachable 10-round box-style magazine.

The Pancor Corporation Jackhammer is a 12-gauge, gas-operated automatic shotgun.

Some features, such as the details of the gas-operated bolt selection process, were studied by US Army engineers after the war.

The resulting design did not see real success before it was switched to a simpler gas-operated system in the Gewehr 43.

It is a gas-operated, magazine-fed, selective fire, shoulder-fired weapon with a telescoping stock.

This is a locked breech, gas-operated action which is very similar in its mechanical principles to the future US M1 Garand.

These theoretical relationships are more clearly illustrated in Fig. 7 and their sum can be seen to correlate in form with practical measurements made with the Hesiometer as illustrated in the first portion of Fig. 5 for the cutting mechanism.

* Crank ( mechanism ), in mechanical engineering, a bent portion of an axle, or shaft, or an arm keyed at right angles to the end of a shaft, by which motion is imparted to or received from it

The IPv6 subnet size has been standardized by fixing the size of the host identifier portion of an address to 64 bits to facilitate an automatic mechanism for forming the host identifier from link-layer media addressing information ( MAC address ).

In effect, Medicare is a mechanism by which the state takes a portion of its citizens ' resources to guarantee health and financial security to its citizens in old age or in case of disability, helping them cope with the enormous, unpredictable cost of health care.

# Every document can contain a royalty mechanism at any desired degree of granularity to ensure payment on any portion accessed, including virtual copies (" transclusions ") of all or part of the document.

The triple valve is divided into two portions: the service portion, which contains the mechanism used during brake applications made during service reductions, and the emergency portion, which senses the immediate, rapid release of train line pressure.

The hair ( on the Cramer bow ) is wider than the Corelli model but still narrower than a Tourte, the screw mechanism becomes standard, and more sticks are made from pernambuco, rather than the earlier snakewood, ironwood, and china wood, which were often fluted for a portion of the length of the stick.

The most important portion of the work was that dealing with nervous action and the mechanism of the senses.

As the line is worn, or breaks off, the operator knocks the reel on the ground so that a release mechanism allows some of the line in the reel to extend and replace the spent portion.

Continuing problems with the readout drive mechanism starting and stopping beginning on May 20 resulted in a decision to terminate the photographic portion of the mission on May 26.

The word affect, as used in Tomkins theory, specifically refers to the " biological portion of emotion ," that is, to " hard-wired, preprogrammed, genetically transmitted mechanisms that exist in each of us " which, when triggered, precipitates a " known pattern of biological events ," although it is also acknowledged that, in adults, the affective experience is a result of both the innate mechanism and a " complex matrix of nested and interacting ideo-affective formations.

To synthesize the peptide portion of Daptomycin, the mechanism of a non-ribosomal peptide synthetase ( NRPS ) is employed.

In gas-operation, a portion of high pressure gas from the cartridge being fired is used to power a mechanism to extract the spent case and chamber a new cartridge.

On a firearm or other tool, the pistol grip is that portion of the mechanism that is held by the hand and orients the hand in a forward, vertical orientation, similar to the position one would take with a conventional pistol such as the Glock pistol.