First off get a good pair of sights for your son dont buy yourself an good set and then buy him crap. I personnally like the g5 optix line of sights. Good quality optics, well built all machined metal unlike the apex which are pot metal, and there very light in weight being there made of magnesium. and if you want to change the size of the pins it is very cheap to do so. Theay are also floating smart pins aswell. As you see I love them I have had coper johns, cobras, spothoggs and several others but these I like easy to use and adjust