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Marines select the HK M27 (416) as new Infantry Rifle

 In firearms, Military

The U.S. Marine Corps has selected the HK M27 as its Infantry Automatic Rifle (IAR). This rifle is based on the HK 416 and the Marine Corps couldn’t have made a better choice.  The biggest difference between this firearm platform and the standard M4 platform is the gas system.  The HK M27 is a “piston driven” gun, where as the standard M4 is what they call Direct Impingement (DI). This drastically improves the weapon’s reliability and longevity. To understand the difference we will have to dive into how these guns operate.

The HK M27 (piston driven) operates like this:

The operator pulls the trigger and the chambered round is fired.  The gasses that push the bullet out of the barrel travel down the barrel and out through a small hole on the top of the barrel.  Those gasses then hit the piston (steel rod) and force it backwards toward the shooter, and forces the bolt of the gun to cycle.

 

The M4 (DI) operates like this:

The operator pulls the trigger and the chambered round is fired. The gasses that push the bullet out of the barrel travel down the barrel and out through a small hole on the top of the barrel.  Those gasses then travel down a small tube back towards the shooter, and the gas itself forces the bolt of the gun to cycle.

The gasses and carbon foul the internals of the rifle on a DI AR platform rifle. This means it needs to be cleaned more, it won’t last as long, and it will fail more often. On a Piston Driven platform you no longer have that problem as all the gasses stay forward of the internal parts on the rifle, and you have the piston cycling the action, not the gas itself.

These rifles come in at about $3000 a piece as compared to the much less expensive M4 at about $1000 each, according to www.marinecorpstimes.com. If you ask me it is well worth the extra money to have our Marines properly outfitted with the best gear available.  I’m not alone in this thought:

“I could kit out every grunt in the Marine Corps with the coolest sh*t head-to-toe for $100 million,” Commandant of the Marine Corps Gen. Robert Neller said. “And I intend to do that.”

It’s about time our military, especially the marine corps, is properly equipped, and we have a Commander in Chief willing to spend the money to make our military great again.

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  • Jim Fogarty
    Reply

    Thank you for your service and for this excellent and detailed explanation of how these weapons work.

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