FN M249S Semiauto for Military Collectors

Published on July 10, 2024
Duration: 27:58

This guide details the field stripping and barrel removal process for the FN M249S semiautomatic variant, as demonstrated by Ian McCollum of Forgotten Weapons. It covers the unique steps required for the civilian model, including the use of a specific chamber flag to facilitate barrel removal due to its closed-bolt operation. The process is presented with a focus on maintaining authenticity to the military M249 SAW while adhering to civilian firearm regulations.

Quick Summary

The FN M249S is a civilian semiautomatic version of the military M249 SAW, manufactured in the USA. It operates from a closed bolt for semiautomatic fire, unlike the military's open-bolt full-auto system. The M249S can feed from both 5.56mm belts and standard AR-15 magazines, making it a unique collectible firearm.

Chapters

  1. 00:00Introduction to the FN M249S
  2. 00:57FN Military Collector Series
  3. 03:40Design Philosophy and Authenticity
  4. 05:02Mechanical Overview and Compatibility
  5. 06:54Markings and Controls
  6. 09:34Feeding Mechanisms
  7. 12:30Disassembly and Barrel Removal
  8. 14:37Field Stripping and Internal Mechanics
  9. 22:54Market Success and Conclusion

Frequently Asked Questions

What is the FN M249S?

The FN M249S is a civilian semiautomatic variant of the U.S. military's M249 Squad Automatic Weapon (SAW). It's part of FN's Military Collector Series, designed to be visually identical to its military counterpart while complying with civilian firearm regulations.

How does the FN M249S differ from the military M249 SAW?

The primary difference is the M249S's operation: it fires from a closed bolt in semiautomatic mode, whereas the military M249 SAW fires from an open bolt in full-auto. This conversion is required for civilian legality.

Can the FN M249S use both belts and standard magazines?

Yes, the FN M249S is designed to accept both 5.56x45mm NATO ammunition fed via M27 links and standard AR-15 magazines inserted into its side-mounted magazine well.

Where is the FN M249S manufactured?

The FN M249S is manufactured in Columbia, South Carolina, USA. This domestic production allows it to be legally sold to civilians, bypassing certain importation restrictions.

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