Tranq. Gun

[powers2005]

I am planning a SP TC mod which will have a main weapon of a Tranquilizer dart gun. I could use the Bowcaster base, amoo etc. but I dont want it to kill or harm if possible. If i could make it so as when it hits, it applies a flashbang effect on the target which lasted longer that would be great, but i dont know how to do this. I know that it would involve propeties editing...
Please help.