It sounds like your Ranger is a Model 94AE (angle eject), that's drilled/tapped on top for scope mounts.
The Williams 5D-94AE or the Foolproof FP-94AE will mount in the two rear scope mount holes, and readily zero using the issue height front sight.
Don't forget to remove the rear barrel sight for a clean sight picture, and either order a commercial slot filler blank of file one up (make one) out of the dovetail portion of some old longleaf rear sight.
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