The HK416 in modern warfare The U.S. Marine Corps adopted the HK416 — for them, it’s the M27 — in 2011, but it had been in use for many years before that.

Heckler & Koch specifically designed its HK416 to meet the demands of America’s elite armed forces. Development began sometime in the 1990s, and in 2004, it replaced the M4s carried by Delta Force.