With a crazy-fast reset nearly nonexistent over-travel and a smoother crisper lighter trigger pull the RA-535 Advanced Performance Trigger (APT) helps you fire more quickly and accurately. The single-stage trigger group is easy to install. Includes free anti-rotation pins. – Single-stage – 3.5-lb. pull weight – Unit weight: 2.3 oz. – Quick reset for faster response time between shots – Lightened trigger pull with super-crisp release to improve accuracy and increase target acquisition – Combines straight trigger functionality and comfort with curved control – Self-contained design makes it easy and quick to install with no fine-tuning needed – Anti-rotation pins included – Fits most 308 and .223 AR style platforms – Manufactured and assembled in our facility according to strict AS9100 aerospace requirements which are more stringent than standard gun manufacturing requirements – Quality-assured with high-tech inspection equipment that can measure up to five decimal places two beyond the standard and far more precise than the human eye can detect – Precision CNC machined from high-grade heat-treated tool steel and aluminum – Contained in RISE Armament’s signature bright red 8625 hardcoat anodized aluminum housing – Our products are backed by a lifetime guarantee. – The set screws in the housing should be used with any trigger pins – Note: The set screw should not be tampered with. Any attempts to modify the trigger will void the warranty. – U.S. Patent No. 7293385