First of all, get out of here with that gripping hand silliness! Unless you have a conjoined twin or belong the to Adeptus Mechanicus, you only get two hands! Sorry, had to get that out of my system.
Anyway, the V9 is what we in the AFFS call a 'Capellan Theater' variant. Those whack-a-doodles have been sticking plasma rifles on everything they can, and as you might imagine that presents a problem for conventional vehicles. These days, if you go up against the armies of Liao you had better bring your nomex underpants, and the V9 does. The MagShots aren't quite as silly as they seem either. These days Infantry tend to show up wearing five or six points of armor each, plus they tend to be able to move two and still attack. So, waiting for them to get in range of traditional machine guns more often means you are also in range of getting swarmed. That is, as I'm sure you know, super bad for tanks. The MagShots have the reach to start picking those guys apart at a nice, safe range where they can only murder you with flights of SRM's and...wait...ok, so it isn't a perfect counter, but the point stands that if you want to pick off Battle Armor before they get close enough to tear you apart, you have to start shooting when they are more than 3 or 4 hexes away.
Now, throw that tank over on the Kuritan front, and it's going to shatter. Too many missiles, autocannons, and space samurai with giant, metal hatchets. But it works against the cappies!