Twin Barrel Self-propelled Howitzer Prototype or Koalitsija-SV The 2S35 Koalitsija-SV (coalition) is a prototype twin-barrel self-propelled howitzer. The first demonstrator of this unique artillery system was completed in 2006 and uses a number of components from the 2S19 Msta-S self-propelled howitzer. However production variant of this new SPH will look differently. The Koalitsija-SV is intended to replace the ageing Russian 152-mm artillery systems. The twin-barrel Koalitsija-SV has a high rate of fire comparing with current artillery systems. It might be around 16 rounds per minute. This artillery system will be fitted with two 152- or 155-mm howitzers. Vehicle has a fully-automatic ammunition handling and loading systems. Two barrels have a number of other advantages comparing with usual self-propelled howitzers. The Koalistsija-SV is more reliable as both guns have associated autoloaders and if one of them fails, another keeps on firing. This SPH uses both barrels in quick succession, so the guns do not overheat and have a twice longer service life. The Koalitsija-SV can load both barrels at any inclination angles. This SPH is capable of multiple round simultaneous impact firing. It can also launch two precision-guided rounds, that will hit two different targets simultaneously. The Koalitsija-SV will have an automatic targeting and charge selection system.The demonstrator vehicle has a crew of 5, however production Koalitsija-SV will have a high level of automation. It's crew will consists of only two men, located in a well protected compartment at the front of the hull. Demonstrator of the Koalitsija-SV uses a modified Msta-S chassis, however production self-propelled howitzer will have a new tracked chassis. Production vehicles will be also fitted with larger turret.