Something that should be noted in terms of attacks via weapons: any action made that uses the weapon's ammunition will count, unless it has some extenuating circumstance. An "attack" means an action against an opponent, a simple volley, an entire magazine will all detract from your ammo. SINGLE SHOTS will fall under a gray area that I will pass judgement upon review. I'm not against single shots for the sake of utility without using an 'attack', but there will be no abuse of single shots; after all, using single shots against the enemies your boys and girls will be going up against, armor and shields and whatnot, isn't usually recommended.
How attacks are kept track of will either by made by myself upon describing damage to attacked units, or players may feel free to take off numbers themselves. It will be as simple as a number in parenthesis.