Upgrade your CZ457 with Timney's Rimfire Trigger! This replacement trigger is designed to be durable and easy to use, with a pull weight that can be adjusted from 10 ounces to 2 pounds. Every component of the trigger is precision machined, and the sear and trigger shoe are heat treated to 56 Rockwell with a black oxide trigger coating and an NP-3 coated sear for maximum lubricity and a lifetime of reliable performance.