A mounted gun system is more mobile then a towed system. It gives you the capability of shoot and scoot over a towed system.
On other hand a towed system beats a mounted system on deployability and transportability. You could deploy it on terrain where a mounted system would find it hard to gain foothold plus it has a lower signature during transportation as compared to a mounted system.
Both have their own pros and cons and we need both.
Let us argue against the Army decision to bypass ATAGS
Mounted system cannot match the range of a towed system artillery. The case in point is towed ATAGS and the mounted artillery on a special truck. Moreover nobody has analyzed the weight factor of the mounted system together with truck which weighs 6 to 8 tons all by itself.
Yes, the mounted system is far more mobile which is an advantage than shoot and scoot small distance to avoid enemy counter fire as in Bofor or it’s newest incarnation in India.
Some of the mounted pieces of artillery are in trial/test/operation in Ukraine. Only a few pieces have been sent by France, Germany and probably Sweden (neutral country) to Ukraine. It is pure marketing. This I would say are being tested under battle conditions. There is are disadvantages here and that is, Ukrainian personnel have to be trained which is a cumbersome job under battle conditions, maintenance & repair when these system breakdown or posting the suppliers personnel in the battle zone to do training as well as repairs and have risk of casualties. A lot will be known about suitability of the mounted gun system after Ukraine war.
Indian Army just wanted the Israeli Artillery Gun. They would reject everything by producing excuses of weight, maneuverability and what not. We are not Army men but our eyes are open and read everything. For mountain warfare the Army has equipped itself with light weight American M777. That is the one which will do the work on mountain tops or their vicinity. These are towed guns and could be airlifted or towed anywhere. Then we have a significant number of South Korean self propelled Guns which is roughly 50 toner and will go on mountain roads and reach Tawang or Ladakh of its own power. Hence the argument of 3 tons extra weight on ATAGS is of less important if it is staying 15 to 30 km behind the front lines.
Rejecting an excellent gun ATAGS on flimsy grounds is unbecoming of the Army brass…… What do you say guys?