EGW Guns Picatinny Scope Base Features The EGW Guns Picatinny Scope Base is machined from extruded aluminum with full-width cross-slots gauged to MIL-STD 1913 specs within plus or minus .002 inches ensuring a consistent secure fit for Picatinny or Weaver scope rings. Direct mounting to the factory scope mount holes on the Ruger American Rimfire and Howa M1100 receivers means no drilling or tapping is required during installation. A milled center channel on this lightweight tactical mount reduces overall weight without sacrificing rigidity. At a 6.67 inch overall length and a 2.513 inch center spread it is sized specifically to match these receivers mounting hole pattern. Finished in matte black to minimize glare in the field the base stands just 0.4 inches tall keeping the scope close to the bore for a natural cheek weld. EGW includes socket head Torx screws and a wrench for installation and recommends 20 inch pounds of torque along with a drop of blue threadlocker for a secure mount. The Picatinny footprint opens up compatibility with a far wider range of rings and optics than a proprietary rimfire rail. This base is a straightforward upgrade for rimfire shooters looking to mount a quality optic on their Ruger American Rimfire or Howa M1100 for sale at GrabAGun. EGW Guns Picatinny Scope Base Specifications Manufacturer: EGW Guns Model: Picatinny Scope Base Material: Aluminum Finish: Matte Black Elevation: 0 MOA Mount Type: Picatinny Rail Compatible Hosts: Ruger American Rimfire Howa M1100 Length: 6.67 Center Spread: 2.513 Height: 0.4 Available At: GrabAGun