The Ruger(R) Elite 452? AR-Trigger is the perfect upgrade for any Modern Sporting Rifle*. including the Ruger(R) AR-556(R), SR-556(R), and SR-762?. This new two-stage trigger offers a smooth, crisp, 4.5 lb. trigger pull and a lightweight hammer that enables a 30% faster lock time over standard MSR triggers. The Ruger(R) Elite 452? also features a full-strength hammer spring for consistent primer ignition and includes a safety selector and all necessary pins and springs for easy installation. Packaged with an ergonomic, optimized trigger-reach, polymer pistol grip, the Ruger(R) Elite 452? is shipped fully assembled in a polymer fire control housing which allows the trigger to be dry-fired prior to installation, and the assembly can also serve as a trigger manipulation training tool. As an added benefit, the pistol grip and safety selector switch packaged with the trigger can be installed on any Mil-Spec AR rifle lower as replacement parts. * Fits any MSR receiver with .154" trigger/hammer pins. Genuine Ruger(R) Factory Accessory