The CrossTac ARCA Rail for the Ruger Precision Rifle is a full 16" long and designed to fit perfectly with the Ruger's profile. In addition there are 3 QD mount holes along the bottom. The normally flat ARCA bottom also got the CROSSTAC touch: sand grooved to help alleviate any bind when things get dirty. If you own a Ruger Precision Rifle, you need this rail. FeaturesFront ramp to avoid hanging up on barricadesM-LOK mounting system - 4 positions3 QD Holes for various sling positionsLaser etched scale visible from the top for repeatabilty