Product Features •Heavy-contour (.850" at the muzzle) barrel features a Ruger Precision Rifle 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™ trigger is externally adjustable, with a trigger pull range of 2.25 to 5 pounds; wrench is stored in the bolt shroud. •In-line