Matty, this is a non-perm attach method for red dots. I believe they all weigh a negligible amount since made in aluminum, but I'd say is very popular among some of the guys I shoot with regularly on other model pistols. I don't personally have this on any of my CZ pistols, but i have used them on many glocks and a few other poly framed guns. I don't see why they would be any different on a CZ. Some of them even come with a special holster that will accept the mount while it's on the gun. Pretty cool. But not my method.
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