The M249 - The US Military's Squad Automatic Weapon

Published on January 2, 2023
Duration: 11:22

This guide details the field stripping and reassembly process for the M249 SAW, as demonstrated by Brandon Herrera. It covers the removal and disassembly of the bolt carrier group, gas piston, and other key components. The video emphasizes the M249's mechanical nuances, including its gas-operated, long-stroke piston system and quick-change barrel feature.

Quick Summary

The M249 SAW, or FN Minimi, is a gas-operated, open-bolt light machine gun designed by FN Herstal. It primarily uses 5.56x45mm NATO linked belts but can accept STANAG magazines in emergencies. Its design features a quick-change barrel system and a long-stroke gas piston for reliability.

Chapters

  1. 00:00Introduction and Live Fire
  2. 00:51Legality and Licensing
  3. 02:04History and Nomenclature
  4. 03:04Feeding Mechanisms
  5. 04:48External Features and Optics
  6. 05:12Internal Mechanics
  7. 06:18Field Stripping and Disassembly
  8. 08:05Quick-Change Barrel System

Frequently Asked Questions

What is the M249 SAW's primary operating system?

The M249 SAW operates using a gas-operated, open-bolt system with a long-stroke gas piston, similar in principle to the AK-47, which contributes to its reliability in demanding conditions.

Can the M249 SAW use standard rifle magazines?

Yes, in emergency situations, the M249 SAW can accept standard 30-round STANAG magazines (AR-15/M16 pattern), although its primary and most reliable feeding method is its belt-fed system.

What is the significance of the M249 SAW's quick-change barrel?

The quick-change barrel feature allows the operator to rapidly swap barrels during sustained fire operations. This system includes the gas block and barrel extension, preventing overheating and maintaining combat effectiveness.

Who designed the M249 SAW?

The M249 SAW, also known as the FN Minimi, was designed by FN Herstal in Belgium in 1976. It was adopted by the U.S. military in 1984.

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