SCAR 20 6.5 CM back from FN Service - Dumpster fire continues.

Published on June 6, 2022
Duration: 13:52

This video provides an expert-level analysis of issues encountered with the FN SCAR 20 in 6.5 Creedmoor after returning from FN service. The host, demonstrating deep technical knowledge, details how FN's attempted fix for primer puncturing introduced new problems like under-gassing and unreliable cycling. The content includes detailed troubleshooting steps, ammunition performance data, and comparisons between serviced and unserviced rifles, offering valuable insights for SCAR 20 owners facing similar malfunctions.

Quick Summary

After FN serviced the SCAR 20 6.5 CM for primer puncturing, new issues arose including under-gassing, short-stroking, and unreliable cycling. FN replaced the bolt and firing pin, which fixed primer issues but caused the rifle to malfunction, requiring further investigation into the gas system's performance.

Chapters

  1. 00:10Intro: SCAR 20 6.5 CM Dumpster Fire Follow-up
  2. 00:39FN Service & Warranty Concerns
  3. 01:30FN's Fix: Bolt & Firing Pin Replacement
  4. 02:17New Problem: Under-Gassing & Short-Stroking
  5. 02:56Ammunition Testing Results
  6. 04:26Hypothesis: Gas System Altered
  7. 05:07Comparison: Serviced vs. Unserviced SCAR 20
  8. 05:44Troubleshooting: Swapping Parts Strategy
  9. 06:17Testing Swapped Parts: Bolt Carrier Group
  10. 09:22Testing Swapped Parts: Recoil Spring
  11. 10:43FN's 'Fix' Introduced New Problems
  12. 11:46Next Steps & Call to Action

Frequently Asked Questions

What were the initial problems with the FN SCAR 20 6.5 CM?

The FN SCAR 20 6.5 CM initially suffered from puncturing primers and hard malfunctions, indicating potential issues with the bolt, firing pin, or gas system's interaction with the 6.5 Creedmoor cartridge.

What changes did FN make to the SCAR 20 6.5 CM during service?

FN replaced the bolt and firing pin with a redesigned unit featuring a smaller firing pin hole, a smaller tip, and possibly adjusted protrusion. This aimed to resolve the primer puncturing issue.

What new problems arose after FN serviced the SCAR 20 6.5 CM?

After FN's service, the SCAR 20 6.5 CM began experiencing under-gassing, leading to short-stroking, unreliable cycling, failure to feed, and failure to lock open on the last round.

How did the host troubleshoot the SCAR 20 6.5 CM's cycling issues?

The host systematically swapped the bolt carrier group and recoil spring from the serviced rifle into an unserviced rifle to confirm that the serviced rifle was indeed under-gassed and that the gas system itself was the primary issue.

Related News

All News →

More Gunsmithing & DIY Videos You Might Like

More from Military Arms Channel

View all →