What Causes Light-Primer Strikes?

Published on March 18, 2019
Duration: 7:30

This video explains the causes of light primer strikes, a common firearm malfunction. It covers basic troubleshooting like cleaning and ammunition quality, then delves into mechanical issues such as weak hammer/trigger springs and bolt 'out of battery' conditions. The host emphasizes that these problems are often found in home-built AR platforms due to component balancing.

Quick Summary

Light primer strikes on AR-15/AR-9s are often caused by weak hammer/trigger springs or the bolt being out of battery. Ensure your firearm is clean, use quality ammunition, and check spring tension and buffer system components for reliability.

Chapters

  1. 00:00Introduction to Light Primer Strikes
  2. 01:30Basic Troubleshooting Steps
  3. 02:17Mechanical Causes: Springs
  4. 03:16Bolt Orientation and Battery Issues
  5. 06:01Summary and Conclusion

Frequently Asked Questions

What is a light primer strike?

A light primer strike is a firearm malfunction where the hammer drops, but the firing pin doesn't strike the primer with enough force to ignite the round, often leaving a small indentation.

What are the main causes of light primer strikes?

Common causes include weak hammer or trigger springs, a bolt that is not fully in battery, or issues with ammunition quality. Basic maintenance like cleaning is also crucial.

How can I fix light primer strikes on my AR-15?

First, ensure the firearm is clean and the ammunition is good. Then, check for weak springs or ensure the bolt is fully in battery, which might involve inspecting buffer springs and weights.

Are home-built ARs more prone to light primer strikes?

Yes, home-built AR platforms can be more susceptible to light primer strikes if the components are not perfectly balanced or compatible, affecting the firearm's cycle of operations.

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