3000 Rounds and Then This Happened -- Zastava M90

Published on April 19, 2026
Duration: 19:58

This video details the post-event inspection and cleaning of a Zastava M90 after 3,000 rounds and exposure to heavy rain at Kalash Bash. The presenter, Mark, discusses the feeding issues encountered, attributing them primarily to environmental factors and improper gas system settings rather than magazine or internal component failures. He provides a detailed look at the internal wear patterns, noting minimal abnormal wear despite significant exposure to the elements, and offers insights into potential issues with aftermarket triggers and their interaction with the carrier tail.

Quick Summary

The Zastava M90 experienced feeding issues after 3000 rounds due to heavy rain and humidity at Kalash Bash, compounded by an improperly set gas system. Internal inspection revealed minimal abnormal wear, suggesting good durability despite environmental challenges. Aftermarket triggers can cause carrier tail deformation due to hammer design.

Chapters

  1. 00:38Introduction & Zastava M90 Recap
  2. 01:14Pulling Apart the M90
  3. 02:13Kalash Bash 2026 Experience
  4. 03:34The Final Stage Incident
  5. 05:07What Happened During Competition
  6. 05:33Analyzing Feeding Issues
  7. 06:16Magazine vs. Environmental Factors
  8. 06:39Gas System Settings & Ammunition
  9. 07:26Competition Results
  10. 08:06Internal Inspection: Wear Patterns
  11. 09:06Visible Rust and Debris
  12. 10:35Assessing Wear on Rails and Bolt
  13. 11:01Surface Rust vs. Deep Wear
  14. 12:06Cleaning and Further Inspection
  15. 13:04Carrier and Trunnion Condition
  16. 13:44CMC Trigger and Carrier Tail Interaction
  17. 15:46Post-Cleaning Assessment
  18. 17:02Overall Zastava M90 Performance
  19. 18:24Viewer Engagement & Final Thoughts

Frequently Asked Questions

What caused feeding issues with the Zastava M90 after 3000 rounds?

The feeding issues were primarily attributed to heavy rain and humidity at Kalash Bash, leading to internal fouling and rust. The presenter also noted that the gas system was not adjusted appropriately for the conditions and ammunition used, exacerbating the problem.

How did the Zastava M90 hold up internally after 3000 rounds and competition?

Despite significant exposure to rain and heavy use, the Zastava M90 showed minimal abnormal wear on its internals. There was some surface rust and debris, but critical components like the trunnion and bolt exhibited expected wear patterns for the round count.

Are aftermarket triggers problematic for the Zastava M90?

Yes, aftermarket triggers with sharp hammer ledges, like the CMC trigger mentioned, can cause deformation on the carrier tail. Zastava designs their own hammers with rounded ledges to mitigate this issue, and they generally advise against certain aftermarket trigger installations.

Is the Zastava M90 a good value for an import AK?

The presenter believes Zastava USA rifles offer excellent value for their price, considering the quality and performance. They are considered among the better import AK options currently available on the market.

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