gsg makes them for sig. sig just stamps their name on the slide. ive got one but its a gsg make. if i knew sig was going to distribute them i would have waited a little and gotten the sig for easier warranty service.
i like mine. it cycles everything. only real issue i have is the sights are plastic and cheap.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith