Origins and Early History of the USMC M27 Infantry Automatic Rifle

Published on December 29, 2017
Duration: 14:11

This guide details the cleaning and maintenance of the USMC M27 Infantry Automatic Rifle, based on insights from a former Marine infantryman with combat experience. It highlights the M27's gas piston system for easier cleaning compared to direct impingement systems like the M4/M16, emphasizing thorough cleaning of the piston, bolt, and barrel. Proper lubrication and function checks are crucial for maintaining reliability.

Quick Summary

The M27 Infantry Automatic Rifle (IAR) was developed to offer a lighter, more accurate alternative to the M249 SAW for USMC infantry. Its gas piston system simplifies cleaning compared to direct impingement rifles like the M4, and its heavier barrel aids heat management during sustained fire, proving advantageous in combat scenarios like those in Afghanistan.

Chapters

  1. 00:00Introduction and Nomenclature
  2. 00:55Replacing the M249 SAW
  3. 02:30Combat Utility in Afghanistan
  4. 03:39Early Adoption and Fielding
  5. 04:23M27 vs. HK416 Differences
  6. 05:11Sights and Slings
  7. 06:25Infantry Resistance and Feedback
  8. 07:44Durability and Accessory Issues
  9. 10:11Bipod Criticism
  10. 11:20Maintenance and Gas System

Frequently Asked Questions

What is the primary advantage of the M27 IAR over the M249 SAW for infantry patrols?

The M27 IAR offers a significant advantage in lighter weight and superior accuracy at ranges of 300-600 meters, making it more practical for long patrols in varied terrain compared to the heavier M249 SAW.

How does the M27 IAR's gas system compare to the M4/M16?

The M27 IAR utilizes a gas piston system, which makes it considerably easier to clean and results in less carbon buildup in the chamber compared to the direct impingement system found on the M4 and M16 rifles.

What were some early issues reported with the M27 IAR?

Early production models of the M27 IAR experienced issues with accessories like the buttpad, scope covers, and pistol grip compartment covers detaching, often requiring improvised solutions like dummy cording for retention.

What are the key differences between the M27 IAR and the HK416?

While based on the HK416, the M27 IAR features a 30% heavier barrel for better heat management, a convex buttstock, a bayonet lug, and a 16.5-inch barrel, optimizing it for sustained automatic fire.

Related News

All News →

More Gunsmithing & DIY Videos You Might Like

More from TFB TV

View all →