subclass_of chain gun
An ___MASK33___ or automatic ___MASK21___ is a large , fully automatic , rapid - fire projectile weapon that fires armour - piercing or explosive shells , as opposed to the bullet fired by a machine gun . Autocannons often have a larger calibre than a machine gun ( e . g ., 20 mm or greater ), but are usually smaller than a field gun or other artillery . When used on its own , the word " ___MASK33___ " indicates a ___MASK41___ - barrel weapon . When multiple rotating barrels are involved , the word " rotary " is added , and such a weapon is referred to as a " rotary ___MASK33___ ." Modern autocannons are typically not ___MASK41___ soldier - portable or stand - alone units , rather they are usually vehicle - mounted , aircraft - mounted , or boat - mounted , or even remote - operated as in some naval applications . As such , ammunition is typically fed from a belt to reduce reloading or for a faster rate of fire , but a magazine remains an option . They can use a variety of ammunition : common shells include high - explosive dual - purpose types ( HEDP ), any variety of armour - piercing ( AP ) types , such as composite rigid ( APCR ) or discarding sabot types ( APDS ). A chain ___MASK68___ is a type of ___MASK65___ or autocannon that uses an external source of power to cycle the weapon rather than diverting energy from the cartridge , and does so via a continuous loop of chain similar to that used on a motorcycle or bicycle . `` Chain ___MASK68___ '' is a registered trademark of Alliant Techsystems Inc . for a chain - powered weapon . An ___MASK95___ is a selective - fire rifle that uses an intermediate cartridge and a detachable magazine . Assault rifles were first used during World War II . Though ___MASK5___ nations were slow to accept the ___MASK95___ concept after World War II , by the end of the 20th century they had become the standard weapon in most of the world ' s armies , replacing semi - automatic rifles , ___MASK81___ rifles and sub - machine guns in most roles . Examples include the StG 44 , AK - 47 and the M16 rifle . ___MASK7___ is a class of large ___MASK70___ weapons built to fire munitions far beyond the range and power of infantry ' s small arms . Early artillery development focused on the ability to breach fortifications , and led to heavy , fairly immobile siege engines . As technology improved , lighter , more mobile field artillery developed for battlefield use . This development continues today ; modern self - propelled artillery vehicles are highly mobile weapons of great versatility providing the largest share of an army ' s total firepower . A ___MASK89___ ( SMG ) is an air - cooled , magazine - fed , automatic carbine designed to fire pistol cartridges . The term " ___MASK89___ " was coined by John T . Thompson , the inventor of the Thompson ___MASK89___ . An automatic ___MASK72___ is an automatic ___MASK50___ that fires ___MASK72___ shells and uses some of the energy of each shot to automatically cycle the action and load a new round . It will fire repeatedly until the trigger is released or ammunition runs out . Automatic shotguns have a very limited range , but provide tremendous firepower at close range . A ___MASK65___ is a fully automatic mounted or portable ___MASK50___ , designed to fire bullets in quick succession from an ammunition belt or magazine , typically at a rate of 300 to 1800 rounds per minute . Fully automatic firearms are generally categorized as submachine guns , assault rifles , battle rifles , automatic shotguns , machine guns , or autocannons . Machine guns with multiple rotating barrels are referred to as " rotary machine guns ". The ___MASK90___ ___MASK96___ is a ___MASK50___ term . A ___MASK96___ is a projectile expelled from the barrel of a ___MASK50___ . The term is from Middle French and originated as the diminutive of the ___MASK90___ boulle ( boullet ) which means " small ball ." Bullets are made of a variety of materials . They are available singly as they would be used in muzzle loading and cap and ball firearms , as part of a paper cartridge , and much more commonly as a component of metallic cartridges . Bullets are made in a large numbers of styles and constructions depending on how they will be used . Many bullets have specialized functions , such as hunting , target shooting , training , defense , and warfare . A ___MASK73___ gun is an artillery piece . Originally the term referred to smaller guns that could accompany a ___MASK73___ army on the march and when in combat could be moved about the battlefield in response to changing circumstances ( ___MASK73___ artillery ), as opposed to guns installed in a fort ( garrison artillery / coastal artillery ), or to siege ___MASK21___ or mortars which were too large to be moved quickly , and would be used only in a prolonged siege . A ___MASK72___ ( also known as a scattergun , or historically as a fowling piece ) is a ___MASK50___ that is usually designed to be fired from the shoulder , which uses the energy of a fixed shell to fire a number of small spherical pellets called shot , or a solid projectile called a slug . Shotguns come in a wide variety of sizes , ranging from 5 . 5 mm (. 22 inch ) bore up to bore , and in a range of ___MASK50___ operating mechanisms , including breech loading , single - barreled , double or combination gun , pump - action , bolt -, and lever - action , semi - automatic , and even fully automatic variants . ___MASK17___ of ___MASK3___ is the frequency at which a specific ___MASK92___ can ___MASK3___ or launch its projectiles . It is usually measured in rounds per minute ( RPM or ___MASK36___ / min ), or rounds per second ( RPS or ___MASK36___ / s ). A ___MASK81___ rifle is a ___MASK70___ service rifle that fires a full - power rifle cartridge , such as 7 . 62 × 51mm NATO , 7 . 62 × 54mmR , 7 . 92x57mm Mauser , . 303 British , or . 30 - 06 Springfield . Compared to assault rifles and their intermediate cartridges , the higher - caliber rounds provide greater power and range , though they have greater weight and produce stronger recoil , making them less than ideal for fully automatic fire .