Sulaco, if I remember right tritium is mildly radioactive, and it's probably limited by the government because IIRC it can be used as a booster agent in the production of fission/fusion type nuclear weapons. Not the sort of thing you want running around in large quantities in an age when nuclear materials are increasingly easy to get ahold of. Guldan, that's an awesome modification. What knife did you use, it looks sort of like the handle of one of Trident's knives.
Lagarto