***For Nexus Evo Gen 1 customers who are roughly on or below serial number 500. The original grip module will cause fitment issues when trying to install our new Billet Aluminum Trigger Pack (Lower)***

Over the years, CZ has produced trigger pack housings with varying tolerances, resulting in noticeable differences in fitment from one lower to another. To address this variation, we have developed an updated grip block design that helps ensure proper fit and function, whether your lower fitment is tight or loose.