No offense, man, but it is no different than tritium sight inserts. Lots of us have those on pistols. I have them in my watch! It is less radioactive material than you find in an old smoke detector.

I dare say that if the regulations are the reason why, it isn't becuase the Dept of Energy said no, but becuase SBR didn't want to fill out paper work. More likely, there is a percieved lack of a market. People see that radioactive trefoil, and they run. Silly humans.