Designed with the same quality features found in all CMC Triggers, the CMC Triggers AR-15/10 Full-Auto Select Fire Drop-in Trigger has been created explicitly with Military and Law Enforcement in mind. Designed for performance that provides the confidence needed to get the job done in any operational or training situation. In semi-automatic mode, the CMC Full-Auto is a precision Rifle Triggers that allows precise and accurate trigger control. In fully-automatic mode, the CMC Full-Auto offers a smooth, continuous trigger pull and abrupt hammer release. CMC's AR-15/10 "Classic" Curved Drop-in Trigger Group is for the shooter who wants a traditional feel. The Curved Trigger has an exceptionally smooth feel and ultra-clean break. With excellent lock time and lighting fast positive reset, the CMC Curved Trigger is unsurpassed by any other fire control group. Our critical sear engagement surfaces have a propriety machining process that renders superior surface finish and dimensional control. As compared to our competition, the techniques we use to establish a 1-2 RMS surface finish as opposed to EDMing which leaves a pitty 32 RMS at best. Compared to a mirror which is 0 RMS, this is what sets the CMC Trigger apart from its competition. CMC Triggers sear engagement overlap is up to 6-8 times greater than our competitors. This provides a much safer trigger and enhances reliability. Specifications for CMC Triggers AR-15/10 Full-Auto Select Fire Drop-in Trigger: Manufacturer: CMC Triggers Color: Black/Silver Trigger Shape: Curved Included Accessories: Anti-Walk Pin Set Features of CMC Triggers AR-15/10 Full-Auto Select Fire Drop-in Trigger: Full-Auto Compatible Single Stage Trigger Available Pull Weight: 4.5 Ultra-crisp trigger with no feel of creep prior to hammer release The trigger has a glass-smooth break with no feel of grittiness Minimal lock time is designed into the assembly using controlled hammer weight and balance activated by a rocket wire hammer spring, assuring repeatable function with either commercial or military grade ammunition Trigger pull is factory pre-set and not user adjustable Positive trigger reset allows a quick follow up shot on target Hand-assembled, and hand tested Totally self-contained one-piece assembly Comes with CMC Anti-Walk Pin Set Fits MIL-SPEC AR-15 and AR-10 style rifles Made from 8620 Alloy Steel and S7 Tool Steel with machined tolerances of +/- .001" Encased in an Aluminum box with an anodized coating for increased rigidity to withstand full-auto rate of fire Easy to install - Install Instructions Package Contents: CMC Triggers AR-15/10 Full-Auto Select Fire Drop-in Trigger