Bolt and barrel extensions are CNC-machined from high-strength super alloy steel that outperforms traditional C158 bolts; The bolt carrier assembly features a chrome-lined 8620 steel bolt carrier and nitride-processed gas key staked in place. The titanium firing pin has been DLC-coated for long service life; 4140 chrome-moly steel barrel is cold hammer-forged with ultra-precise 5R rifling; The heavy profile barrel balances nicely and its attractive, black nitride finish helps ensure exceptional accuracy, longevity; Ruger 2-port Boomer muzzle brake has large perpendicular surfaces to redirect gas and reduce felt recoil; 5/8″-24 muzzle threads on the barrel remain compatible with other brakes, flash hiders, and suppressors; 15″ Lite aluminum handguard is free-floated for accuracy and features Magpul MLOK accessory attachment slots along the 3:00, 6:00 and 9:00 positions; The mid-length gas system features a 0.75″ 4-position rotary-regulator gas block to achieve ideal function across the wide range of ammunition available in the marketplace today; Equipped with a Ruger Elite 452 trigger that delivers a smooth, crisp 4.5-pound 2-stage trigger pull; A full-strength hammer spring and lightweight hammer ensure fast lock times and consistent primer ignition; Made from a 7075-T6 hard-coat anodized aluminum forging, the upper receiver is complete with brass deflector, forward assist, and full-length Picatinny rail; Venting holes in the upper receiver, barrel extension, and bolt carrier ensure that excess gas is directed safely away from the user; The Magpul MOE SL stock and MOE grip provide positive control and ergonomics; The receiver end plate includes an additional socket for a QD sling swivel pocket and fills the offset space at the rear of the receiver