The Phase 5™ OMR (Oversized Magazine Release) is a drop-in two-piece assembly that replaces the Mil-Spec magazine release button. Installation is easy and requires no gunsmithing. Both the OMR button and paddle are machined from 6061-T6 billet aluminum for a lightweight, strong design. Features: - Larger contact surface than a Mil-Spec magazine release button - Ergonomic pocket on surface of paddle for your finger - CNC machined from lightweight 6061-T6 billet aluminum for strength - Compatible with Extended Bolt Releases - Compatible with Anti rotation trigger/hammer pin sets - Available in different anodized color finishes Fits AR 5.56/.223 and 7.62/.308 receivers. Proudly made in the U.S.A., with U.S.A. sourced material. Package includes: -Button -Paddle -Screws -hex key