TC Encore Keylock Scope Base Fits TC Encore and Pro Hunter barrels. World famous for its toughness, this Keylock base has been made EVEN TOUGHER... Full width slots for locking into rings with more surface area, and repositioned slots for better strength and mounting convenience. Includes free installation when purchased with an Encore barrel. Installations are scheduled for Thursdays. Designed to fit any Weaver style rings, this new base continues with our free 6-Screw drill and tap installation package... Giving the strongest possible Encore scope base attachment in the world. This base is included with our Encore 2 and 3 Ring scope mounts or you can order it by itself and add your own rings. Click Here to see all of our Keylock scope mounts!