that would be the 2100 which has a rifled barreled instead of a smoothbore.
rifled air gun
why does that sound so badass
co2 is fine, he's just going to have to need to buy co2 cartridges every now and then
gamo is also a good company iirc; haven't really shot pellet guns in a while but i used to routinely as a kid and from what i remember we never had any problems with their stuff