"Dammit, that reminds me I need to get a blaster of some kind 'cause I wanted to show a coupla people how to shoot. Handgun is projectile, too?"

He's generally assuming it's higher calibre and, well, if they don't run out of bullets that makes it easier since that's always been his biggest issue with projectile weapons. Blaster charges just lasted longer.

Arrow never really ran out of energy, lucky for him.