Heckler & Koch has released a new .22 LR blowback-action version of its HK416D 5.56x45 mm NATO short-stroke gas piston carbine.

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.

The Heckler and Koch 416 assault rifle bears a strong resemblance to the M4 carbine, at least on the outside. Inside it’s a different ball game, as the weapon uses an operating system designed ...