Surefire G2 ?

[UnCdude2004]

So I own a Surefire G2 flashlight and of course it doesn't have a pocket clip. Now after serching Google I read about a NovaTac clip that would fit but I don't know if I need a different tail cap that locks out to use it or not. Also it said that the older style worked better for the g2 but I can only find the newer style. Anybody have experience with these or have another solution.

Thanks
Brad