Rimfire Technolgies used to make a rail for the CZ dove-tail. It was not as flexible as the DIP for ring spacing but used the same set screw pattern and was rock solid. The DIP is an improved version of the RT. When I had my CZ, I don't think DIP was even making rails. With either, the set screws bite well into the receiver and the design just works.
The RT rail replaced 7.3/Brownells rings on my CZ. The 7.3/Brownells are no lightweights though. You can crank the shhit out of the clamp hardware. I used them on 22lr mini-slide hammers (semi-autos) and they don't move. They come with recoil lugs so its simple to mill a recoil slot in the receiver (dove-tail). Small file works too.
Not sure about the regular version of the 7.3 though (called 7.3/22). Only one screw per clamp.
Last edited by 4th_point; 10/19/14.
