CMC Triggers revolutionary Glock trigger utilizes our patented "Signature Flat" shoe design, we've downsized the overall geometry to create an excellent fit in the Glock pistol. All of the superior traits from the AR platform are replicated here in our Glock trigger design. Features: Clean take-up Ergonomic design Positive trigger reset Totally self-contained, one-piece assembly Made from 8620 alloy steel and S7 tool steel Compatible with several models Easy to install Trigger Housing Not Included