EGW Guns Mossberg Scope Base Features Machined from ultra rigid extruded 7075 T6 aluminum this EGW Guns heavy duty scope base drills to the factory scope mount holes on compatible Mossberg 500 590 835 930 and 935 shotguns requiring no additional drilling or tapping to install. The lower profile heavy duty design reduces the optic s height over the bore compared to lightweight mounts helping shooters maintain a more natural cheek weld while aiming through a mounted scope. Full width cross slots are held to MIL-STD 1913 tolerances of plus or minus .002 inches for a precise repeatable fit with Picatinny or Weaver rings. Included socket head Torx screws and a wrench make for a simple at home installation and EGW recommends 20 inch pounds of torque with a drop of blue Loctite to keep the base secure under recoil. This direct mount design gives shotgun owners a durable no compromise path to adding a red dot or scope for turkey hunting home defense or slug shooting. For Mossberg shotgun owners who want a rugged precisely machined scope base this option is available for sale at GrabAGun. EGW Guns Mossberg Scope Base Specifications Brand: EGW Guns Fits: Mossberg 500 590 835 930 935 Post-1997 Style: Picatinny Material: 7075 T6 Aluminum Finish: Black Matte Mount Type: Direct Number of Bases: 1 Available At: GrabAGun