Just to let you guys know, that is not a copy of the GRT-III . It's closer to a copy (if that's what it is) of the old GTX-II but I don't even think it is a copy of that. I believe it is a picture of the old GTX-II that is doctored to the photo. Steve-in-NC passed out a whole bunch of them free way back when because they were so bad they couldn't be sold and wouldn't even work in most guns without a lot of repair work.