UBM "Breakthrough" is unified for the installation of guns 2A46M-5 or with the placement of the conveyor 2A82 gun with automatic loader in the bottom of the housing.
2A46M-5. Smoothbore gun 2A46M-5 is a well-known instrument upgraded 2A46M (D-81TM). The design of the upgraded guns ensures interchangeability with the gun 2A46M (2A46M-1) with replacement of body armor and attachment points tsapfennyh devices with the installation of additional balancing loads on tank factories. In addition to new shots, gun design ensures the applicability of shots of all types and indexes of 2A46M gun ammunition, including TOUR. The upgraded gun 2A46M-5 has the following structural differences from the production of guns 2A46M:
• barrel has differentiated tolerance raznostennostennosti in the muzzle of the
variation in wall thickness not exceeding 0.6 mm, • the barrel stiffness increased to 420 kgf / cm
• barrels of guns 2A46M-5 interchangeable with barrel guns 2A46M;
• guide the trunk in a cradle prism type
• reduced Cantilever barrel in the cradle and cradle cap elongation than 160
• Rear guide to the cradle box has been moved to a more assertive oboymennuyu part is made of bronze-faced, this design eliminated the quick coupling pipes with a breech;
• introduce additional lyuftovybirayuschie device cradles the neck (2 pieces), in lyuftovybirayuschih devices used rollers instead of the stops than the possible effects of wear stops to preload the shaft to guide the cradle and reduced frictional force in this connection by replacing sliding friction bearings;
• applied backlash-free tsapfennye nodes with elastic rolls and reverse wedge, whereby the effect of play in the pivot on the accuracy is reduced;
• For automatic account bending barrel when firing at the muzzle of the pipe provided for mounting the reflector device accounting bend the trunk (CID).
Compared with the gun 2A46M accuracy 2A46M-5 increased by 15-20%, the total dissipation at shooting immediately dropped by 1.7 times. Cannon in 2003 graduated from the state tests, in 2005, was adopted by the Russian Army and serially produced at the Yekaterinburg artillery plant number 9. Currently 2A46M-5 is installed on all tanks T-90A, coming off the assembly line "Uralvagonzavod".
2A82. Smoothbore gun with a high-power avtoskreplennym and partly chrome barrel 2A82 is a completely new design, only superficially similar with 125mm tank guns previous generation.
The achieved level of energy performance 2A82 cannon can provide a significant advantage over serial and evolving domestic and foreign counterparts. Muzzle energy cannon 2A82 substantially more muzzle energy of a well-known gun Rheinmetall Rh 120/L55. The technical level of the superiority of the new gun is estimated to 1,2-1,25 times. Particularly impressive are the values of the coefficient of metal use and the specific loading of the barrel — the most important parameters characterizing the design perfection.
T05BV UDP-1. As an extra weapon on the modernized tank has a traditional setting coupled with a gun gun 6P7K PKTM 7.62 mm ammunition 2,000 rounds and a new remote-controlled machine gun system T05BV UDP-1 modular design.
UDP is designed for short-range self-defense, suppression and destruction of tank hazardous manpower (infantry) of the enemy at ranges up to 1500 m To ensure these objectives is enough gun caliber rifle. Therefore, as a basic version control equipment provides 7.62-mm machine gun with ammunition 6P7K PKTM 800 rounds in two stores UDP is mounted in the turret just behind the commander's panoramic sight to provide a circular firing (UDP sector of fire is 316 °). UDP skompleksirovana commander panoramic sight. It has two-plane stabilization. Vertical angles are pumping from -10 ° to +45 °. Television has its own low-level scope, integrated in LMS "Kalina". Managing UDP and can be duplicated as a commander and gunner. The signal from the sight of UDP is displayed on the main panel of the commander and gunner, while firing can be carried out and, according to the main sighting system using appropriate thermal channels.
Of course, increases the cost of installation UDP modernization, but the developers of the modernized tank provided an alternative, "budget" option of additional weapons: the commander at the hatch to accommodate a machine gun swivel (two points) are. It can be mounted machine guns of 7.62 mm PKM 6P6, 6P41 "Pecheneg», FN MAG, or 12.7 mm 6P50 "Kord" and FN Browning M2. Thus it is ensured firing angles: horizontal — to starboard 102 °, to the left side 88 ° (with an additional installation point — 168 °) and from +30 ° to -10 ° vertically.
Implementation in UBM "Breakthrough" the latest domestic developments in the field of artillery systems and ammunition provides modernized T-90 fire superiority over all existing tanks, including the latest «Leopard 2A7 +" (Germany), XK-2 (South Korea), «Altay» (Turkey ), Type 10 (Japan).