I just bought an M6 for my girlfriends' G19. I got a hell of a deal for it...165 bucks brandy new...probably miss marked, but I couldn't pass it up.  Anyone have experience with them...how do they hold up over time. I'd like to for it remain on the gun at all times...especially during our training sessions... so that she is used to extra weight and using the controls for the light/laser but I also want to make sure it'll hold..should the unthinkable occur. Thanks!

I guess I'm the only one who bought one of these...damn...that's not a good sign...