Crosstac Ruger Precision ARCA MLOK Rifle Rail - The Ruger Precision Rifle dedicated ARCA Rail from CROSSTAC for MLOK front ends. The RPR ARCA rail is a full 16in 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. Full 16in Lengle Front Ramp To Avoid Hanging Up On Barricades M-LOK Mounting System 4 Positions And Hardware Includes 3 QD Holes For Various Sling Positions Made In The USA