Surefire z68 tail cap - SureFire Replacement Flashlight Protective Rear Cap Switch

I bought a scout light with a momentary cap, twist for constant light. I was not happy with it and it did not have a good lock out when backed off. The Surefire Z68 clicky style tail cap has enough resistance in the button for good momentary use. Push a little harder and it clicks to constant on. Back off the cap a little bit and the light is locked out and will not turn on.