This is a DIP Products Model 19078 rail for a CZ 457, 0 MOA. It had been spoken for but the deal fell through so here we go again. It is very lightly used, mounted for one NRL season of junior shooters, but no real marks I can see. The thread lock used was purple, and always torqued to the lowest possible torque. I know some people don’t like this style, but of the 12 or so I’ve used I’ve never had a problem. $30 shipped.