Not to sound nit-picky (you can make your LEGO whatever you want), but canonically, the AT-ST
has a concussion grenade launcher on the right side, rather than just a generic gun. So personally, I would have statted it as a launcher.
Shamelessly blatant self-promotion: check out my armory
, where you can find new custom abilities and battle-gear stats, and my MOCPages page
, which I really ought to update more often.