The Ruger AR556 MPR features a handguard that is free-floated for accuracy and enhanced ergonomics. Magpul M-LOK accessory attachment slots along the 3:00, 6:00 and 9:00 positions of the handguard, along with additional slots on the angled faces near the muzzle allow any combination of accessories to be attached to the rifle. The Ruger Elite 452 AR-Trigger is a two-stage trigger that offers a smooth, crisp, 4.5 pound trigger pull. It features a full-strength hammer spring for consistent primer ignition and a lightweight hammer that enables a faster lock time for improved accuracy. The Ruger muzzle brake is a radial port design that significantly reduces felt recoil and muzzle movement.