About the 2S33 Msta-SM

[FIMMCH98]

Like the title says, is there any information about this project besides it's overall capabilites that can be found in globalsecurity.org?
Besides how much better it was supposed to be in comparison to the 2S19, there aren't schematics, pictures or detailed descriptions of what it was supposed to look like and could do.
It used a longer gun or only increasing the propellant and/or chamber pressure was enough to accomplish such increase in range?
This kind of questions.

 

[WhiteDemon]

The 2S33 Msta-SM project involved the replacement of the 2A64 gun with a 2A79 product of the same caliber, the installation of new loading means and a promising SLA. In accordance with the statement of work, the firing range of a high-explosive fragmentation projectile was supposed to exceed 30 km, and active-reactive - 40 km. The rate of fire was brought to 10-12 rounds / min. The device from the new MSA took on part of the crew’s tasks, reducing the preparation time for firing and the intervals between shots.



SPG 2S19 "MSTA-S" at the training ground, 2018. Photo by the Ministry of Defense of the Russian Federation / mil.ru