The CMC AK2.0 Elite 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. FeaturesMade from 8620 Alloy Steel, S-7 Tool Steel, and 7075-T6 aircraft grade AluminumFactory preset and non-user adjustable 2.5lb, 3.5lb, or 4.5lb Pull WeightUltra-crisp triggerGlass-smooth breakMinimal lock timePositive trigger resetHand assembled; hand testedTotally self-contained one-piece assemblyEasy to install