the hw100 kt carbine not heavy at all mate best thing to do would be to take him to the shop and let him have an hold of different guns so you can see what suits him best i know may ruin the suprise if for xmas but you dont want to be buying a gun without him holding it and it be al wrong for him the s410 may be bit heavy and abit long for him the ultra may be a god lace to start but as said take him and you can see rathr than him saying its fine when its not