FN USA M249S semi-auto rifle!

Published on June 19, 2016
Duration: 25:57

This guide details the field stripping and reassembly process for the FN M249S semi-automatic rifle, as demonstrated by an experienced firearms instructor. It covers barrel removal, internal component access, and reassembly, emphasizing the use of specific tools and lubricants for optimal performance. The instruction highlights key differences from the full-auto M249 SAW, particularly the closed-bolt operation and striker assembly.

Quick Summary

The FN M249S is a semi-automatic rifle, distinct from the military's fully automatic M249 SAW by its closed-bolt operation. It demonstrated 100% reliability over 500 rounds in testing, with near-zero felt recoil due to its weight. The rifle costs approximately $8,000 and requires specific maintenance, including the use of specialized lubricants like Battle Born Grease.

Chapters

  1. 00:00Introduction to the FN M249S
  2. 01:20Disassembly and Mechanical Differences
  3. 03:16Internal Components
  4. 05:01Reassembly and Lubrication
  5. 07:18Ammunition Linking
  6. 08:37Range Testing: Belt-Fed Operation
  7. 11:19Rapid Fire and Trigger Reset
  8. 13:53Magazine Feeding Reliability
  9. 15:52Conclusion and Future Testing

Frequently Asked Questions

What are the key differences between the FN M249S and the military M249 SAW?

The primary difference is that the FN M249S is a semi-automatic rifle firing from a closed bolt, making it legal for civilian ownership. The military M249 SAW is a fully automatic weapon that fires from an open bolt.

How reliable is the FN M249S in testing?

During testing, the FN M249S demonstrated 100% reliability over nearly 500 rounds, functioning flawlessly with both belt-fed ammunition and standard 30-round STANAG magazines.

What is the approximate retail price of the FN M249S?

The FN M249S carries an approximate retail price of $8,000, reflecting its specialized nature as a semi-automatic version of a military-grade machine gun.

What type of lubricant is recommended for the FN M249S?

A high-quality, 100% synthetic lubricant designed for high-rate-of-fire weapons, such as Battle Born Grease, is recommended for maintaining the FN M249S and ensuring its optimal performance.

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