Global Demand for HK 416 Is Driving Down Price of Marines' M27 A U.S. Marine fires his M27 Infantry Automatic Rifle while conducting squad attack exercise in Bahrain on Dec. 1, 2016.

Run through the gallery below for a closer look at some of the differences and unique features common to the HK416 and the M27 IAR. Second, there's a question of what mags work in the gun.

PM got to spend some time recently with the world's newest celebrity weapon: the HK416, the U.S. Special Forces assault rifle that (we're pretty sure) killed Osama bin Laden.

The Heckler and Koch 416 assault rifle modifies the system, preventing dirty gas from from entering the receiver. Although the 416 still diverts gas, it uses the gas to push a piston which in turn ...

KSK and KSM, which serve similar roles to Delta Force and the Navy’s top-tier DEVGRU unit, will receive a more ergonomic take on the 416 in the A7 variant.

One of the best things about our weapon design is that it’s actually the M4 carbine! The U.S. Army could have this new carbine by replacing the upper receiver on existing M4s with a HK 416 upper ...