It will be hard to beat an ARMS mount for your application (which one would be determined by the scope you get). As far as the scope Leupold was listening and has a new CQT MK4 1-3 that would be ideal.
Use the Mark 4 CQ/T at 1x and it functions as a non-magnifying, illuminated sight for tactical scenarios or engaging targets at extremely close range. Dial up to 3x and you can accurately engage targets at medium ranges.
The Circle Dot reticle ensures fast target acquisition. Use the circle’s edge to lead targets at long distances. You can also estimate range with the Circle Dot reticle. Place the target inside the circle of the reticle. At 3x the diameter equates to 6 feet in height at 100 yards. At 200 yards, 6 feet is measured from the dot to the edge of the circle. DOT SIZE:
3 MOA at 3x, 9 MOA at 1x. Edge to edge, the subtension of the circle is 18 inches at 25 yards, or 6 feet at 100 yards when set on 3x. From the center of the dot to the edge of the circle, the subtension is 6 feet at 200 yards when set on 3x. The width of the line creating the circle is large enough to be easily visible, but thin enough so as not to obliterate an 18-inch object at 500 yards when set on 3x.
What Makes The Mark 4 CQ/T Revolutionary:One AA battery powers the Mark 4 CQ/T for up to seven hours of continuous use on the highest intensity setting (AA battery included)Battery check determines battery lifeBattery can be quickly and easily replaced in the field without tools (extra battery packs also available)Reticle is visible when not illuminated (no batteries required to use the scope)Ten illumination settings to match any light conditions without overwhelming your natural low-light vision; two low-intensity settings work with night-vision devicesMounts to MIL-STD-1913 rail bases (with optional mounting hardware), AR-15s and M16s with handles, and similar firearmsSpecialized eye relief optimized for M16 variant cheek weld—mount the scope in the preferred middle receiver positionLarge field of view for fast target acquisition and tracking of moving targetsAttach accessories to the Mark 4 CQ/T (such as a laser designator, flash light, or night-vision device) using the integrated MIL-STD-1913 rail mount cross slotsWindage and elevation adjustments can be made in 1/2-MOA “click” increments; to ensure precision, the clicks are both audible and tactileLegendary Leupold ruggednessAbsolute waterproof integrityDiamondCoat™ scratch-resistant lens coating on all exterior lens surfaces; Multicoat 4® on all interior lens surfaces to maximize light transmission
Leupold CQ/T 1-3x14 MK4.......$782.95
Leupold CQ/T flattop mount.....$29.95