The Midwest Industries AR-15 Enhanced Drop-In Trigger Group allows you shoot more accurately with less effort. The ultra-smooth break with a crisp, clean release make accurate shots a breeze. The Enhanced design also features a quick reset and low overtravel for enhanced speed. The self-contained design of the trigger group makes it easy and quick to install with no fine-tuning needed. Features3.5lb Single-stage trigger systemFits small pin size (.154)Interior parts are S7 tool steel with heavy-hit hardening then black nitride finished for enhanced strength and corrosion resistanceLightened trigger pull (3.5-lb. pull weight)Lightened hammerDrop safety featureCNC machined from high-grade, heat-treated tool steel and aluminumBlue anodized aluminum cassette housingFits most .308 and .223 AR style platformsAnti-walk pins and screws included Note: The center set screw should not be tampered with. Any attempts to modify the trigger will void the warranty.