Crosstac Ruger Precision Rifle ARCA Rail M-LOK 16 inch Black. The RPR ARCA rail is a full 16 in 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. Included Accessories: MLOK T-nuts qty 4 Specifications for Crosstac Ruger Precision Rifle ARCA M-LOK Rail: Manufacturer: Crosstac Included Accessories: Standard Gun Model: Ruger Precision Color: Black Gun Rail: M-LOK Gun Make: Ruger Gun Type: Rifle Quantity: 1 Length: 16 in Package Contents: Crosstac Ruger Precision Rifle ARCA M-LOK Rail What firearm models does the manufacturer say Crosstac Ruger Precision Rifle ARCA M-LOK Rail is compatible with? The manufacturer says that Crosstac Ruger Precision Rifle ARCA M-LOK Rail is compatible with Ruger PrecisionCrosstac 135060-RPR: Ruger Precision Rifle ARCA Rail M-LOK 16 inch Black