I too am looking for a base. My scope is made for maybe an AR15. It has a Mill dot reticle calibrated to 223. It sits too far back on the rifle, it must be longer than standard eye relief compared to my other scopes. Target turrets, side focus (paralax) and goes up to 18x. My head is too far back on the stock. The gun shoots great.

I shoot this rifle on Saturday morning offhand 100 yard match. Occasionally they will hold a 200 yard offhand match.

David