From the Vault: FN M249S

Published on February 19, 2018
Duration: 6:38

This video provides a detailed look at the FN M249S semi-automatic variant of the Squad Automatic Weapon. Paul Leavitt from Brownells demonstrates its features, operation, and field stripping process. He highlights its similarity to the military M249, its belt-fed and magazine-fed capabilities, and its internal mechanism, comparing its bolt carrier group to an AK-47.

Quick Summary

The FN M249S is a semi-automatic civilian variant of the military's M249 Squad Automatic Weapon, firing 5.56x45mm ammunition and capable of belt or magazine feeding. Its internal bolt carrier group is notably similar to an AK-47, but it lacks the sear notch of the full-auto version, using a striker assembly instead.

Chapters

  1. 00:13Introduction to FN M249S
  2. 00:34History of the M249 SAW
  3. 00:51Caliber and Feed Options
  4. 01:05Operating the Feed Tray
  5. 01:31Loading Belted Ammunition
  6. 02:11Charging the Weapon
  7. 02:36Unloading Procedure
  8. 03:01Top Cover Mechanism
  9. 03:17Magazine Loading Feature
  10. 03:50Safety and Controls
  11. 04:11Disassembly - Step 1: Rear Pin
  12. 04:41Disassembly - Step 2: Recoil Spring
  13. 04:53Disassembly - Step 3: Bolt Assembly
  14. 05:02Disassembly - Step 4: Stock & Grip
  15. 05:31Disassembly - Step 5: Barrel Removal
  16. 06:12Disassembly - Step 6: Gas Tube & Bipod
  17. 06:25Conclusion

Frequently Asked Questions

What is the FN M249S?

The FN M249S is a semi-automatic civilian variant of the military's M249 Squad Automatic Weapon. It's designed for squad-level support, fires 5.56x45mm ammunition, and can be fed via belts or magazines.

How is the FN M249S loaded?

To load the M249S with belted ammunition, place the belt over the feed tray with brass facing down, close the top cover, and charge the weapon. It can also accept standard magazines.

What are the key internal differences between the M249S and the full-auto M249?

The primary internal difference is that the M249S lacks the sear notch on its bolt carrier group. Instead, it uses a striker assembly that engages the piston to fire.

Can the FN M249S be field stripped?

Yes, the FN M249S can be field stripped by removing the rear pin, recoil spring assembly, bolt, stock, pistol grip, barrel, and gas tube. This process is demonstrated in the video.

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