'"Coalition-SV"') is a Russian self-propelled gun first seen in public (initially with its turret covered) in 2015 during rehearsals for the Moscow Victory Day Parade.

[3] The 2S35 was originally designed as a variant of the 2S19 Msta, consisting of a 2S19 chassis with modified turret, fitted with an over-and-under dual autoloaded 152 mm howitzer.

[3] While the dual-gun design was unsuccessful and abandoned after about ten years, the name assigned to that dual-barrel system, Coalition (because it was combining two guns with two full barrels in one unit) was retained.

[14] The 2S35 has increased automation that reduced the number of crew members, to perhaps just two or three people[15] located in an armored capsule[2][4] below the two front hull hatches.

[20][21][22] The 2S35 will feature a modular ammunition charge system, which allows changing the amount of propellant used in firing of each individual shell.