Dual dovetail bases are the same as Redfield / Leupold style, but instead of the windage screws holding the rear ring to the base, they are omitted, and instead, the rear ring is turned in, just like the front. This does not offer the extra windage adjustments that the standard bases offer, but it is hardly ever of major importance, and the trade-off of a more securely installed ring is certainly worth the trade.![]()