Smyth Busters: Is It Necessary To Lap Scope Rings?

Published on December 22, 2020
Duration: 3:27

This guide, presented by experts from Brownells on 'Smyth Busters,' details the process and necessity of lapping scope rings. Lapping ensures a precise fit, preventing uneven pressure and potential scope tube damage. The guide covers when lapping is needed, particularly with less precise mounts, and provides steps for achieving an even contact surface for optimal scope performance.

Quick Summary

Lapping scope rings is a gunsmithing technique to ensure perfect alignment and even contact between the scope tube and the rings. It's crucial when using less precise mounts to prevent scope damage and maintain zero. High-quality, precision-machined one-piece mounts may negate the need for lapping due to their manufacturing accuracy.

Chapters

  1. 00:04Introduction: Lapping Scope Rings
  2. 00:27Purpose of Lapping Rings
  3. 01:03Precision Mounts vs. Standard Rings
  4. 01:45When Lapping is Needed
  5. 02:14Avoiding Scope Tube Damage
  6. 02:23Conclusion: Lapping is Plausible
  7. 03:04Call to Action

Frequently Asked Questions

What is the primary purpose of lapping scope rings?

Lapping scope rings ensures a precision fit between the scope and the rings. This process aligns the inside of the rings perfectly with the scope tube, providing uniform contact and preventing uneven pressure that could damage the scope or affect its performance.

When is lapping scope rings typically necessary?

Lapping is often necessary with less precise mounts or bases that are extruded rather than precisely machined, leading to misaligned scope rings. The quality of the base directly impacts the alignment of the rings mounted upon it.

Can modern scope mounts eliminate the need for lapping?

Yes, high-quality, one-piece precision machined scope mounts, like certain Spuhr-style designs, are manufactured to such tight tolerances that they typically do not require lapping. However, this precision is not exclusive to one-piece mounts.

What are the risks of not lapping scope rings when needed?

Failing to lap scope rings when they are misaligned can result in crimping the scope tube or putting it under tension. This can lead to damage to the scope's internal components or cause it to lose zero unexpectedly.

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