I have a SW9VE and everyone knows that it doesn't have an actual rail. It just has that pointless slot. Well, I am wanting to mount a light on my sigma and I don't want some rail adapter on there. I'm positive that years ago I saw a light that was specifically for that type of slot. Like an M4 or M6 Streamlight or something. Anyway, I am doing a lot of reading and research because I'm considering reshaping the slot to a picatinny rail. My two main concerns are one, weakening the structural integrity of the frame, and two, permanently ruining my frame in any other way. Ultimately, I'm looking into picking up a Sig P229 but until that day comes, I'd like to be able to have a mounted light on my sigma. Anyone have any light to shed on this topic?