Colt's first PDW the MARS rifle is BACK! 5.56x30

Published on January 28, 2026
Duration: 29:32

This video provides an in-depth look at the Colt MARS (Miniature Assault Rifle System), a Personal Defense Weapon (PDW) concept revived by Centurion Arms. Originally designed by Mike Harris to outperform 9mm submachine guns and challenge AK-47s, the MARS utilizes a unique 5.56x30mm cartridge. The review highlights its development, technical modifications to an M4 platform, and the reasons Colt initially shelved the project. Expert analysis from Chris Bartocci underscores the historical significance and technical innovation of the MARS.

Quick Summary

The Colt MARS (Miniature Assault Rifle System) is a PDW concept revived by Centurion Arms, based on a shortened M4 platform. It fires a unique 5.56x30mm cartridge, developed by Mike Harris, which uses special powder to achieve high velocities (approx. 2600 fps) from a short barrel, outperforming other PDW rounds.

Chapters

  1. 00:00Introduction to the Colt MARS PDW
  2. 01:10Historical Context and PDW Concept
  3. 02:16The 5.56x30mm Cartridge Explained
  4. 06:13Technical Modifications to the M4 Platform
  5. 10:35Internal Piston System and Part Comparison
  6. 11:49Why Colt Abandoned the Project
  7. 14:38The Revival by Centurion Arms

Frequently Asked Questions

What is the Colt MARS rifle?

The Colt MARS (Miniature Assault Rifle System) was an early Personal Defense Weapon (PDW) concept developed by Colt. It's essentially a significantly shortened M4 carbine designed to fire a unique 5.56x30mm cartridge, offering enhanced performance over pistols and submachine guns.

What makes the 5.56x30mm cartridge special?

The 5.56x30mm cartridge is a 'wildcat' round developed by Mike Harris. It uses magnum pistol powder to achieve high velocities (around 2600 fps) from a short barrel, outperforming other PDW rounds like the 5.7x28mm and 4.6x30mm.

Who is reviving the Colt MARS rifle?

Centurion Arms is currently working to bring a finalized version of the Colt MARS rifle to both US and international markets. They are focusing on modernizing ammunition sourcing and providing support for enthusiasts.

Why did Colt initially stop production of the MARS rifle?

Colt shelved the MARS project in the late 1990s primarily out of fear that it would compete with and potentially cannibalize sales of their existing M4 carbine and their newly invested 9mm submachine gun programs.

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