Heavy-contour (.875″ at the muzzle) barrel features a Ruger Precision Rifle Magnum Muzzle Brake with tunable compensator to effectively reduce recoil and muzzle jump. Ruger Marksman Adjustable trigger is externally adjustable, with a trigger pull range of 2.25 to 5 pounds; wrench is stored in the bolt shroud. In-line recoil path manages recoil directly from the rear of the receiver to the buttstock, not through a traditional bedding system, providing maximum accuracy potential. Ruger Precision MSR stock features a bottom Picatinny rail and soft rubber buttpad. The left-folding stock hinge accepts any AR-style stock. Length of pull and comb height are adjustable. Cold hammer-forged, chrome-moly steel barrel with 5R Rifling at minimum bore and groove dimensions, minimum headspace and centralized chamber. 18″ aluminum free-float handguard is black hard-coat anodized aluminum and features Magpul M-LOK slots on all four sides for improved scope clearance for long-range scopes and easy mounting of M-LOK-compatible rails and accessories. Ambidextrous manual safety for left- or right-handed lever manipulation. 30 MOA Picatinny rail secured with # 8-40 screws for increased long-range elevation capabilities. “Upper” receiver and one-piece bolt are precision CNC-machined from pre-hardened 4140 chrome-moly steel to minimize distortion. Three-lug bolt with 70° throw features dual cocking cams and a smooth-running, full diameter bolt body. Bolt body is nitrided for corrosion resistance, smooth operation and durability. Barrel can be replaced easily by a competent gunsmith using headspace gauges. Magazine well front is contoured for a positive grip when bracing against shooting supports. Oversized bolt handle for positive bolt manipulation, with a 5/16″-24 thread pattern for easy replacement. Bolt disassembly tool is stored in the Ruger Precision Rifle Billet Aluminum Bolt Shroud for easy striker channel cleaning. “Lower” magazine well halves are precision machined from aerospace-grade 7075-T6 aluminum and are Type III hard-coat anodized for maximum durability. Extended trigger-reach AR-style grip and 45° ambidextrous safety selector. May be configured with any AR-style grip and selector. Handguard includes integral QD sling attachment points to eliminate the need for additional adaptors, a target-style flat bottom that improves stability and an integral bottom 1.50″ dovetail that is compatible with RRS S.O.A.R. and similar QD systems.