rocket, bullet and laser.

Seems a little clunky.

I would call the types of attacks explosive, projectile, and energy.

That leaves you more open to expand the battle system.

For example, if you wanted to incorporate Star Trek lingo you could have rockets and photon torpedos. Both would be explosive.

You could have lasers and phasers, both would be energy.

You could have cannons and railguns, both would be projectile.

you could even have explosive ammo that would be both projectile and explosive.

Just a thought.