Medium-contour (.75" at the muzzle) barrel features a Ruger Precision Rifle Hybrid Muzzle Brake to effectively reduce recoil while minimizing noise and blast to the sides of the shooter. Patented multi-magazine interface functions interchangeably with AICS and M110/SR-25/DPMS/Magpul-style magazines (works with some M14 magazines). Ruger Marksman Adjustable(TM) 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 Mfg: Ruger