The CMC Triggers Single-Stage 3.5lb AR-15 / AR-10 Match Trigger is a drop-in trigger system designed to deliver a crisp, clean, and consistent trigger pull with your favorite AR-pattern rifle. Machined to tolerances of +/- .001″, the 8620 alloy steel and S7 tool steel construction offer exceptional strength and natural corrosion resistance while the self-contained design offers lightning-fast installation. The controlled hammer weight and the balanced rocket wire hammer spring deliver minimal lock time for reliable operation with any commercial or military-grade ammo pairing. The positive trigger reset delivers rapid and accurate follow-up shots on target. Plus, this single-stage trigger is set at a light 3.5lb pull weight for unparalleled reliability and consistency in competitive and precision shooting applications. Includes CMC's anti-walk pin set.