Simtimus Heavy Industries
[b] Koalitsiya Twin-Gun Self-Propelled Howitzer Prototype[/b]
Pages of history
The story of Koalitsiya-SV starts not with the single-barrel howitzer we see today, but with this experimental [b]twin-gun prototype[/b]. In the mid-2000s, Russia began work on a replacement for the 2S19 Msta-S, aiming for much higher rate of fire and automation while still using a 152 mm gun.
The first concept was essentially a heavily modified 2S19 chassis carrying an over-and-under pair of 152 mm howitzers in a common turret, fed by an autoloader. This “coalition” of two barrels is where the name Koalitsiya (“Coalition”) came from.
The twin-gun layout promised a dramatic boost in sustained fire and multiple-round simultaneous-impact (MRSI) missions, but also brought problems: weight, recoil management, complexity, cost, and limited internal space.
By around 2010 the Russian MoD abandoned the dual-barrel variant, deciding that similar fire rates could be achieved with a single advanced gun, new autoloader and improved propellant modules. The Koalitsiya name, however, stayed with the later single-barrel 2S35 Koalitsiya-SV, which has since completed state trials and entered limited service.
Your in-game vehicle recreates this “what if” branch of history: the rare twin-gun Koalitsiya that never went into series production, but absolutely should have existed in a game.
Key Words
2S35, Koalitsiya-SV, Koalitsiya twin gun, double-barrel howitzer, 152 mm SPG, Russian SPG prototype, Msta-S successor, Coalition-SV.
What you found in game
Built around T72 hull, it has a great protection in front and good mobility. It has two Battle Tank cannons which gives it great fire rate, though it leads to a weaker punch.
It can be controlled as a tank or using coordinates. In coordinate mode you have two options, High Angle Fire (default) and Direct Fire mode.
Beside that it is Battalion Datalink connected which makes possible targeting using multiple units and giving the possibility to respond back to ground threats.
[b]Its max range of application is 5km.[/b] If target is further away, turret won't move in shooting position.
Shell type
Shells amount
HE
134
FRAG
135
[b]Total[/b]
[b]163[/b]
Updates
[b]13 January 2026[/b] – Added improved ballistic computer.
Credits
• [url=https://steamcommunity.com/sharedfiles/filedetails/?id=3645073873]Ballistic Calculator V5[/url]
• [url=https://steamcommunity.com/sharedfiles/filedetails/?id=3428588881]ROIFF[Transmit Only][/url]