Evolution Gun Works Egw Scope Base Ruger American Short Action Pctny Rail 20moa. We recommend measuring the hole spacing in your receiver to confirm it matches with the dimensions we have published. Picatinny cross slots run the full length of the rail which gives the shooter flexibility when mounting scope rings and other accessories. The channel in the center reduces the overall mass of the mount. Also in many cases it will not obstruct usage of factory iron sights. Our one-piece scope mounts are the obvious choice for hunters and tactical shooters alike. We machine these in our shop using one of our machining centers. After machining the mounts are tumbled sand blasted and Type II anodized for long lasting durability. Installation: We recommend 20 inch lbs of torque and a drip of blue loctite (loctite is available through our website and is sold separately). Specifications for Evolution Gun Works Egw Scope Base Ruger American Short Action Pctny Rail 20moa: Manufacturer: Evolution Gun Works Color: Black Finish: Matte Fabric/Material: Aluminium Alloy Quantity: 1 Cant: 20 MOA Hand: Ambidextrous Gun Make: Ruger Gun Model: Ruger American Rifle Short Action Action Length: Short Action Gun Type: Rifle Length: 8.3 in Height: 0.4 in Included Accessories: T-10 Bit #6-48 X 1/4 Screws Condition: New Mount Type: Picatinny Ring Type: Mil-std 1913 Picatinny Attachment Type: Picatinny Gun Rail: Picatinny Package Contents: Evolution Gun Works Egw Scope Base Ruger American Short Action Pctny Rail 20moa Evolution Gun Works Egw Scope Base Ruger American Short Action Pctny Rail 20moa