Marine Corps Colt IAR M27 Submission - Rare Colt Rifle

Published on October 20, 2020
Duration: 19:15

This video provides an in-depth comparison of the Colt IAR submission for the USMC's Infantry Automatic Rifle program and the HK M27 IAR that was ultimately adopted. The presenter, with clear expertise, details the technical specifications and design philosophies behind each rifle, highlighting the Colt's innovative heat mitigation system and the HK's gas piston operation. The discussion delves into the historical context of the SAW and the evolution of automatic rifle concepts within the Marine Corps.

Quick Summary

The USMC's Infantry Automatic Rifle (IAR) program sought a lighter alternative to the M249 SAW, favoring magazine-fed designs for easier ammunition sharing. The Colt IAR submission excelled with its advanced heat mitigation system and direct gas impingement, while the adopted HK M27 IAR utilized a gas piston system without comparable thermal management.

Chapters

  1. 00:10Introduction: SAW vs. IAR
  2. 00:53FN M249 SAW Details
  3. 01:27USMC's Shift to Magazine-Fed
  4. 01:57Shooting the M249 SAW
  5. 03:59Colt IAR Submission Overview
  6. 05:19Colt IAR Front End Features
  7. 06:14Colt IAR Heat Sink Technology
  8. 07:14Colt IAR Monolithic Upper
  9. 07:38Colt IAR Gas System & Lower
  10. 08:22Colt IAR Rear Features
  11. 09:09Colt IAR Excellence & HK Comparison
  12. 09:43Shooting the Colt IAR
  13. 11:34Colt vs. HK M27 Comparison
  14. 12:18HK M27 Features (MR556A1)
  15. 12:35HK M27 Gas Piston vs. Colt DI
  16. 13:55Key Differences: Heat & Piston
  17. 14:28Weight & Recoil Comparison
  18. 15:38HK M27 Accuracy & Sentiment
  19. 16:44SAW vs. Colt IAR Weight & Capability
  20. 17:29Conclusion: Colt IAR Should Have Won?
  21. 18:01Tribute to Corey

Frequently Asked Questions

What was the primary goal of the USMC's Infantry Automatic Rifle (IAR) program?

The USMC's IAR program aimed to develop a lighter and more portable weapon than the M249 SAW. The concept favored magazine-fed rifles, allowing for easier ammunition sharing among infantry squads, unlike the belt-fed SAW.

How did the Colt IAR submission address heat management compared to the HK M27 IAR?

The Colt IAR submission featured an innovative aluminum heatsink and an external shield designed to absorb and dissipate barrel heat. The HK M27 IAR, while accurate, lacked this advanced heat mitigation technology, relying on a standard quad rail handguard.

What is the main difference in operating systems between the Colt IAR submission and the HK M27 IAR?

The Colt IAR submission utilized a direct gas impingement system, similar to the M16. In contrast, the HK M27 IAR employed a gas piston operating system, which is a common feature in modern machine guns for enhanced reliability.

Why was the Colt IAR submission considered a strong candidate for the USMC's IAR program?

The Colt IAR submission met the USMC's specifications for weight reduction, magazine feeding, and incorporated advanced heat mitigation technology. Its design was seen as a significant step forward in infantry automatic rifle concepts.

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