How a 34 mm scope mounts to a 3/8 inch (9.5 mm) dovetail: use 34 mm rings cut for the 3/8 inch (9.5 mm) dovetail pattern. Ring size, the fit and the height to pick.
Updated 05 September 2026.
Fit a 34 mm scope on a 3/8 inch (9.5 mm) dovetail
A 34 mm scope on a 3/8 inch (9.5 mm) dovetail: the ring size, the pattern to match and how ring height clears the objective.
Rings must match the tube. A 34 mm scope needs 34 mm rings; a ring cut for another diameter either will not close or lets the tube slip. The ring pattern must also match the 3/8 inch (9.5 mm) dovetail.
A 3/8 inch groove often shares rings with the 11 mm metric dovetail because the widths overlap, but measure before buying so the ring tightens square. Once the diameter and pattern match, ring height decides objective clearance: low rings for a small objective, taller rings as the bell grows.
- ›34 mm scope tubematch rings to the tube
- ›3/8 inch (9.5 mm) dovetailthe base
- ›Ring height and objective clearancepick the height
Questions and answers
Fit a 34 mm scope on a 3/8 inch (9.5 mm) dovetail?
A 34 mm scope fits a 3/8 inch (9.5 mm) dovetail with 34 mm dovetail rings cut for the tube, or an adapter plus Picatinny rings. The rings (or adapter-mounted rings) must be cut for 34 mm; measure the dovetail and use a scope stop on a spring air rifle.