I switched from my Horton to the Excalibur line because of weight, this would be a big factor for your son. The Excalibur is a lot lighter then most Compound CB's IMO. I have not shot it since I own a Vortex, but the Vixen is a nice light and smaller CB. A few big grown men on here have it and kill deer with pass through just fine. Here is a link to a site that has the best prices IMO.

http://www.bowhunterssuperstore.com/product_info.php?cPath=40_145&products_id=318

Excalibur 2007 Vixen Crossbow
[EX2095B]


$319.95

Excalibur 2007 Vixen Crossbow.

Producing arrow speeds in excess of 285 FPS, the 150 lb. Vixen is a high performance crossbow that is manufactured with an eye towards economy, but with no sacrifice of quality or durability. Finished in practical and economical Deerhide Brown the Vixen uses Excalibur's patented machined trigger unit and reliable recurve limbs to achieve accuracy that' s not just amazing, it' s guaranteed! Each Vixen features an ambidextrous manual safety, quick detach sling studs and is drilled and tapped to receive optional scope and quiver mounts. The Vixen's shorter, lighter draw and compact size make it a perfect choice for hunters of lesser stature or physical strength while still delivering plenty of power for even the largest of game.