The bolt action rifles are too expensive to be viable in any real sense of the word. Currently, the M24 and Nagant aren't an option unless you want to take the gun just to have fun. At 2 points they may seem cheap in comparison to the Marksman's other options, but when you add attachments the cost adds up quickly. The greased bolt(which is basically a necessity for the bolt action) is a very expensive 3 points. The bolt action rifles and the greased bolt could be priced at one point each and still not be that much of a competitor for the semi auto rifles.
As it stands right now, the Technicals seem relatively plain. Given that the conflicts that inspired Sandstorm have some truly impressive modifications of varying degrees, I think it would be an excellent touch to give Security and Insurgents each their own touches.
The interiors of the Technicals are practically bare. These are the vehicles transporting people into combat? It could be really nice to have some small details that make them feel more personalized. For the insurgents you could have seat covers, a necklace hanging from the rear view mirror. Small touches that put you in the moment more. Sandstorm has always been an immersive game, that should extend to tactics involving its vehicles.
Additionally, each team's technical could be made more recognizable with a few distinguishing features. Have some haphazardly welded armor plating for the insurgent technicals -- examples of this in the real world are endless. It would also make the car itself being able to soak tons of bullets to the body feel more logical from a player's perspective. The security technicals could have a grill on the front meant for ramming or moving vehicles, and maybe some kind of camouflage on it that's in keeping with the rest of their uniforms. If not camouflage though, the amount of dust those things accumulate in a desert war zone would certainly be noticeable.
Any other ideas would be more than welcome.