Makes you wonder what kind of heat the military grade assault cannons are packing, doesn't it?
We haven’t gotten a lot of 5th Edition books dealing with militaries, active war zones, and such. SR2 and SR3 had some teases here and there, but it was SR4’s
War,
Mil-Spec Tech, and
Mil-Spec Tech 2 that went into the most detail.
The Ares Heavy Railgun seems like a good “baseline” for the sort of thing you’d see as the primary weapon on a main battle tank or a very heavily armored infantry fighting vehicle: Damage 10P, AP -6 (but halving all but smart armor before applying AP), SA/BF, and Assault Cannon range table (with the extreme range extended out to 5,000 meters). You’d have to adjust the numbers to make them fit into SR5, but the general idea is “Panther Cannon But Way Better.”
Vehicle-mounted lasers remain a “not quite ready for prime time” weapon technology, which they’ve been since way back in SR1... I think the general idea is that lasers are
More of a MacGuffin that exists as something Mr. Johnson and Tanaka-san can send the ‘runners after. They have stats because, inevitably, someone is going to want to use it in the shootout that results. But they aren’t really meant to be played with.
Then again, SR4 gave use rules for a plethora of anti-ship missiles, cruise missiles, and other weapons that although not technically WMDs sure as hell feel like they are in a game meant to focus on low-life thieves-for-hire.
Personally, I’d just assume the stats for almost any military vehcile’s “primary” weapon is just:
Okay, you’re dead. Do not pass GO. Do not collect 200¥. Roll up a new character.