Mine is a G2x Pro. My wife got it for Christmas a few years ago at Bass Pro Shop for like $65 right after they came out, but now they are like $95...
It has two levels, which makes it handy. 90 lumens for most everyday uses, 200 when you need it, you could spot deer with it...
I bought a universal knock off clamp mount that will mount to anything from my AR to my '97 WInchester, but the light is so darn handy I now carry it with me every day.
My only suggestion is to unscrew the handle a little so you can accidentally turn it on in your pocket...it gets HOT quickly when you do
Some day I will need to buy another for a weapon light.