SKS: Bolt Mod - Popped Primer Fix (HD)

Published on August 18, 2012
Duration: 5:41

This guide details a DIY modification for the SKS bolt face to address popped primer issues. By carefully grinding down a raised area on the bolt face and then slightly countersinking the edge, the presenter aims to prevent the bolt face from contacting the primer prematurely, which is identified as the cause of bent or broken firing pins. The process requires basic gunsmithing tools and a methodical approach to avoid altering headspace.

Quick Summary

To fix popped primers in an SKS, modify the bolt face by grinding down any raised center area to make it flat and then slightly countersinking the edge. This prevents premature primer contact and potential firing pin damage. Use a vise, a fine-grit ceramic stone, and an 82-degree countersink bit, working slowly to avoid headspace issues.

Chapters

  1. 00:08Introduction & Problem
  2. 00:19Firing Pin Issues Explained
  3. 00:34Cause of Popped Primers
  4. 00:53Modification Process Start
  5. 01:09Tools Required
  6. 01:23Sharpening Stone Details
  7. 01:47Countersink Details
  8. 02:07Identifying the Issue Area
  9. 02:29Grinding the Bolt Face
  10. 03:21Countersinking the Bolt Face
  11. 04:32Final Smoothing
  12. 04:49Before and After Comparison
  13. 05:09Expected Outcome
  14. 05:14Follow-up Video Mention

Frequently Asked Questions

What causes popped primers in an SKS rifle?

Popped primers in an SKS are typically caused by a raised area in the center of the bolt face that strikes the primer before the main bolt face. This premature contact can pierce or deform the primer, leading to issues like firing pin damage.

How can I fix popped primers on my SKS bolt?

To fix popped primers, you can modify the SKS bolt face. This involves carefully grinding down any raised center area to make it flat and then slightly countersinking the edge to remove sharp contact points with the primer.

What tools are needed to modify an SKS bolt face for primer issues?

You will need a vise to hold the bolt, a fine-grit ceramic silicone carbide sharpening stone for grinding, and an 82-degree countersink bit to chamfer the bolt face edge.

What is the risk of modifying an SKS bolt face?

The main risk is removing too much material from the bolt face, which can alter the firearm's headspace. It's crucial to work slowly and methodically, only removing what is necessary to flatten the surface and remove sharp edges.

Related News

All News →

More Gunsmithing & DIY Videos You Might Like

More from nsz85

View all →