A firearm is any type of gun that uses an explosive charge and is designed to be readily carried and used by an individual. The term is legally defined further in different countries.
A cartridge, also known as a round, is a type of pre-assembled firearm ammunition packaging a projectile, a propellant substance and an ignition device (primer) within a metallic, paper, or plastic case that is precisely made to fit within the barrel chamber of a breechloading gun, for convenient transportation and handling during shooting. Although in popular usage the term "bullet" is often used to refer to a complete cartridge, the correct usage only refers to the projectile.
In guns, particularly firearms, but not artillery, where a different definition may apply, caliber is the specified nominal internal diameter of the gun barrel bore – regardless of how or where the bore is measured and whether the finished bore matches that specification. It is measured in inches or in millimeters. In the United States it is expressed in hundredths of an inch; in the United Kingdom in thousandths; and elsewhere in millimeters. For example, a US "45 caliber" firearm has a barrel diameter of roughly 0.45 inches (11.43mm). Barrel diameters can also be expressed using metric dimensions. For example, a "9 mm pistol" has a barrel diameter of about 9 millimeters. Since metric and US customary units do not convert evenly at this scale, metric conversions of caliber measured in decimal inches are typically approximations of the precise specifications in non-metric units, and vice versa.
The SVD, GRAU index 6V1, is a semi-automatic designated marksman rifle/sniper rifle chambered in the 7.62×54mmR cartridge, developed in the Soviet Union.
Personal defense weapons (PDWs) are a class of compact, magazine-fed automatic firearms that are typically submachine guns designed to fire rifle-like cartridges. Most PDWs fire a small-caliber, high-velocity centerfire bottleneck cartridge resembling a scaled-down intermediate cartridge, essentially making them an "in-between" hybrid between a submachine gun and a conventional carbine.
The APS underwater assault rifle is an underwater firearm designed by the Soviet Union in the early 1970s. It was adopted in 1975. Made by the Tula Arms Plant in Russia, it is exported by Rosoboronexport.
The Heckler & Koch P11 is an underwater firearm developed in 1976 by Heckler & Koch. It is loaded using a pepper-box-like assembly, containing five sealed barrels each containing an electrically-fired projectile. Two styles of barrel assembly can be used: one containing five 7.62×36mm flechette darts for use underwater, or five 133-grain bullets for use above water.
The KS-23 is a Soviet shotgun. Because it uses a rifled barrel, it is officially designated by the Russian military as a carbine. KS stands for Karabin Spetsialniy, "Special Carbine". It is renowned for its large caliber, firing a 23 mm shotgun shell, equating to 6.278 gauge using the British and American standards of shotgun gauges and approximately 4 gauge using the current European standards, making it the largest-bore shotgun in modern use.
The AS Val "Shaft" and VSS Vintorez "Thread Cutter", 6P30 and 6P29 respectively, were a Soviet-designed assault rifle featuring an integral suppressor based on the prototype RG-036 completed in 1981 by TsNIITochMash. The two rifles hereafter are referred to as the Vintorez and Val. The Vintorez and Val were developed by TsNIITochMash to replace modified general-purpose firearms, such as the AKS-74UB, BS-1, APB, and PB, for clandestine operations, much like the PSS Vul. Manufacturing began at the Tula Arms Plant after its adoption by the Armed Forces of the Soviet Union in 1987.
The Nagant M1895 is a seven-shot, gas-seal revolver designed and produced by Belgian industrialist Léon Nagant for the Russian Empire.
Imperial Tula Arms Plant is a Russian weapons manufacturer founded by Tsar Peter I of Russia in 1712 in Tula, Tula Oblast as Tula Arsenal. Throughout its history, it has produced weapons for the Russian state. Its name was changed from Tula Arsenal to Tula Arms Plant during the Soviet era.
The ASM-DT is a Russian prototype folding-stock underwater firearm. It emerged in the 1990s.
The following are terms related to firearms and ammunition topics.
The TOZ-194 is a 12 gauge, pump-action shotgun manufactured by the Tula Arms Plant.
TOZ rifles are a family of .22 Long Rifle bolt-action cadet rifles manufactured by the Tula Arms Plant. Most notably the TOZ-8, TOZ-17 and TOZ-78 which were used to train generations of Russian military, paramilitary and police cadets.
An underwater firearm is a firearm designed for use underwater. Underwater firearms or needleguns usually fire flechettes or spear-like bolts instead of standard bullets. These may be fired by pressurised gas.
TsNIITochMash is a Russian industrial design bureau which is a major designer and producer of weapons for the Russian military and MVD National Guard. The name is an initialism for Central Scientific - Research Institute for Precision Machine Engineering.
The ADS is a Russian assault rifle specially made for combat divers. It is of a bullpup layout and is chambered in the 5.45×39mm M74 round. The ADS can adapt a suppressor and optical sights.
The TOZ-106 is a small, lightweight bolt-action shotgun produced and sold by Tulsky Oruzheiny Zavod.
The FN 5.7×28mm is a small-caliber, high-velocity, smokeless-powder, rebated, non-tapered, bottleneck, centerfire cartridge designed for pistols and personal defense weapons (PDW) uses, manufactured by FN Herstal. It is similar in length to the .22 WMR and .22 Hornet. Unlike many new cartridges, it has no parent case; the complete package was developed from scratch by FN.
