Christensen Arms One Piece Scope Base CA Ranger Action 40 MOA. Machined from 7075 aluminum and finished with hardcoat black anodize. Specifications for Christensen Arms One Piece Scope Base CA Ranger Action: Manufacturer: Christensen Arms Fabric/Material: Aluminum Length: 16.5 cm Width: 2 cm Weight: 2.1 oz Condition: New Country of Origin: USA Package Contents: Christensen Arms One Piece Scope Base CA Ranger Action Christensen Arms 810-00039-02: One Piece Scope Base CA Ranger Action 40 MOA