2A42 is a 30 mm automatic cannon from the Cold War period and modern times, initially Soviet, and now Russian. The first prototypes of this weapon were made around 1970, but it entered mass production and service in the Soviet Army in 1980. The total weight of the weapon is 115 kilograms, and the barrel length is 2.416 meters. The maximum theoretical rate of fire of the 2A42 cannon is from 550 to 800 rounds per minute, and the average initial velocity obtained by a bullet fired from this weapon is 960 m / s. The maximum range of the 2A42 is 4,000 meters, and the effective range of the shot ranges from 1,500 to 2,000 meters. The presented cannon was developed by a team led by Arkady Szypunov, and the production plant in Tula (Tulamashzavod) was responsible for its production. The gun was developed to replace the 76 mm gun line 2A28 Grom, and its main purpose was to counter armored targets and enemy manpower. The plot 2A42, compared to its predecessor, is a completely new design with a different caliber of weapons, a much higher rate of fire, but also a high firepower for this class of cannon. The 2A42 cannon is the primary weapon of such vehicles as the BMP-2, BMPT Terminator or BTR-90, but it is also used on the Mil Mi-28 helicopter.
2A70 is a threaded, thin-walled 100mm cannon from the Cold War and modern times, initially Soviet, and now Russian. The total weight of the weapon is about 330 kilograms, and its rate of fire ranges from 8 to 10 shots per minute. The cannon is fed with ammunition by an automatic loader. Its main goal is to fight the enemy's manpower, unarmored targets and light field fortifications. It is able to fire high-explosive shells (e.g. ZUOF-17). The "traditional" ammunition for the gun in the BMP-3 car is 40 rounds. The cannon can also fire anti-tank guided missiles, such as the 9M117M, which are loaded manually, and their stock in the BMP-3 is up to 8 rounds. The presented gun is the main armament of the BMP-3 and BMD-4 infantry fighting vehicles. In both cases 2A70 cooperates with a computerized fire control system.