Henry Talley H015 medium base/ring sets. Measures out at 4 1/4" length.
To determine if you need the Early or Current versions of this mount please measure the following on your H015 model:
If you are showing less than 4/10 " from center the of the rear mounting screw hole to the chamber, then you have an Early version of the H015 Series.
Note: Early version base will fit ALL H015 Series single shot rifles but the Current version will only fit current models.
The rear sight must be removed on all models in order to provide clearance for the base. This is a simple operation as the sight is pressed into a standard 3/8" dovetail.
Be sure the firearm is unloaded, then use a blunt punch(brass, wooden dowel, etc.) to drive the sight out from left to right as the rifle is pointed in a safe direction.
With the multitude of scopes available in the marketplace, we cannot match specific scope models to mount heights and it would be best to consult with Talley Manufacturing Inc in such cases.