Anarchy Outdoors Ruger American Rimfire Long-Range Target Scope Base w/ Bubble Level Black 15 MOA. Anarchy Outdoors designed this Ruger American Rimfire scope base to match the specs of this rifle. This one-piece Picatinny scope base comes with either 15 or 30 MOA allowing shooters to zero in their scope at a greater distance. Additionally the built-in bubble level allows the shooter to make sure their rifle is level with each shot which increases consistency and accuracy. Specifications for Anarchy Outdoors Ruger American Rimfire Long-Range Target Scope Base w/ Bubble Level: Manufacturer: Anarchy Outdoors Color: Black Fabric/Material: Aluminum Gun Make: Ruger Gun Model: Ruger American Rifle Rimfire Gun Type: Rifle Weight: 2.5 oz Additional Features: Bubble Level Gun Rail: Picatinny Features of Anarchy Outdoors Ruger American Rimfire Long-Range Target Scope Base w/ Bubble Level Dimensions: 8" x 0.5" x 0.34" Bubble level Package Contents: Anarchy Outdoors Ruger American Rimfire Long-Range Target Scope Base w/ Bubble Level Anarchy Outdoors 791617486072: Ruger American Rimfire Long-Range Target Scope Base w/ Bubble Level Black 15 MOA