Choosing the correct scope ring height is essential for accuracy, comfort, and rifle setup. If your rings are too low, the objective bell may hit the barrel; too high, and your cheek weld will feel unnatural. Here’s a quick guide to help you determine the right height.

What Scope Ring Height Means

Scope ring height is the distance from the top of the mounting rail (or base) to the centerline of the scope tube. It determines how high the optic sits above your rifle.

Factors to Consider

1. Scope Tube Diameter – Common sizes are 1 inch (25.4 mm) and 30 mm. Always check your scope’s specifications.

2. Objective Lens Size – Larger lenses (like 50 mm or 56 mm) require taller rings to clear the barrel.

3. Rifle Platform – AR-style rifles often need higher mounts than bolt-action rifles due to stock and rail geometry.

4. Cheek Weld & Eye Relief – The scope should align naturally with your eye when you shoulder the rifle.

Typical Ring Height Ranges

• Low (12–18 mm): Best for small objectives (≤40 mm) on bolt-action rifles.

• Medium (18–25 mm): Fits 40–50 mm objectives on most rifles.

• High (25–35 mm): Needed for 50–56 mm objectives or flat-top AR rifles.

• Extra-High (35 mm+): Specialized setups, night vision, or large tactical optics.

Quick Measuring Method

1. Measure your scope’s objective lens diameter (lens size + housing).

2. Divide by two to get the radius.

3. Add 2–3 mm clearance to avoid contact with the barrel.

4. Choose rings with a centerline height equal to or greater than that number.

Conclusion

The right scope ring height balances clearance and shooting comfort. For most hunters and shooters, medium rings work for 40–50 mm scopes, while larger objectives and AR platforms may require high or extra-high rings. Always measure before buying to avoid fitment issues.