"Those that don't use the gifts they were born with are rarely of any consequence," Holmes observes.
He raises an eyebrow. "Not aim? What would be the point?" He shakes his head at such idiocy. "If you're just going to shoot haphazardly, I for one would feel much safer if you'd take up the pea-shooter. Now," he continues, soberly, "there are a good many safety rules one should observe with guns. I'm not trying to be patronising Clayborn," Holmes gives Severus a meaningful look. "These are not toys and they can be dangerous. Very. Two of the most important are: Don't point the barrel at anything you're not prepared to shoot, and keep your finger off the trigger until you are prepared to fire."
Call it a derringer; it'll make him feel better. :) The long one is a fairly standard sized paint-ball rifle and the other is about the same size as an UZI. Approximately two-thirds as long as the rifle.