EGW Guns Browning A-Bolt Scope Base Features A slug shotgun is a scoped rifle in everything but bore and it deserves a mounting system built to the same standard which is exactly what this one-piece rail delivers. EGW Guns machines it from extruded 6061 T6 aluminum chosen for rigidity so the front and rear ring positions are fixed relative to one another by the extrusion itself and cannot drift apart the way two independently installed bases can. The 0 MOA elevation keeps the scope s internal adjustment centered which is the right starting point for the ranges a 12 GA slug gun is zeroed at leaving full travel in both directions for load changes. For the deer hunter working shotgun-only country a mount that holds zero through a season of hard carrying and heavy recoil is worth more than any feature on the scope itself. Every cross-slot runs the full width of the rail and is gauged to MIL-STD 1913 specifications within plus or minus .002 in which is the tolerance that makes rings from any maker index correctly into the recoil slots and lets a scope slide forward or back until eye relief is genuinely right rather than merely close. Installation uses the factory scope mount holes already present in the Browning A-Bolt receiver so there is no drilling no tapping and no trip to a gunsmith and the socket head Torx screws and wrench needed for the job are included. EGW recommends torquing to 20 inch lbs with a drop of blue thread locker a specification worth respecting because a rail that is under-torqued will move under recoil and one that is over-torqued can distort. Finished in black and compatible with both Picatinny and Weaver rings the EGW Guns Browning A-Bolt Scope Base is available for sale at GrabAGun. EGW Guns Browning A-Bolt 12 GA Scope Base Specifications Brand: EGW Guns Model: Browning A-Bolt 12 GA Scope Base Style: Picatinny Mount Type: Picatinny Rail Elevation: 0 MOA Gauge: 12 GA Fits: Browning A-Bolt Material: 6061 T6 Aluminum Color: Black Number of Bases: 1 Available At: GrabAGun