CMC Triggers Ruger 10/22 Match Grade Trigger, Drop In, Single Stage, 3.5 LB, Curved, Aluminum, Black 64503 America's favorite rimfire rifle just got better! Introducing the CMC 10/22 Trigger. The CMC 10/22 trigger is a drop in" self-contained trigger pack that is easy to install" with a factory pre-set" non-adjustable 3.5lb trigger pull weight. It features a new textured bolt hold-open button with auto drop function instead of the traditional lever commonly found the Ruger 10/22 rifles. It also features a fully ambidextrous textured magazine release paddle for quicker magazine changes. The CMC 10/22 Trigger utilizes the most advanced manufacturing and quality control techniques. CMC's critical sear engagement surfaces have a proprietary machining process that renders superior surface finish and dimensional control. As compared to their competition" the techniques used to establish a 1-2 RMS surface finish as opposed to EDMing which leaves a pitty 32 RMS" compared to a mirror which is 0 RMS. It is CNC-machined from a single piece of aluminum billet. The use of aluminum and precision CNC machining allows for greater internal clearance. This clearance reduces drag and friction and provides a smoother felt pull. The trigger is extremely well made" much more durable than the standard stock Ruger trigger and includes CMC's Satisfaction Guarantee and Lifetime Warranty.