[Lockbar]

From the original story:

"The 416 looks like the M4, for the only thing that has changed is the gas system that automatically extracts the cartridge after the bullet has been fired, and loads the next round."

Ummmmm, isn't that what any "self-loading" rifle like the M-16 or M-4 already do? Pick up a fresh round from the magazine after each shot and load it into the chamber? The gas piston thing might be an improvement, but the rifle overall function isn't really changed, is it?

[myknowledge]

The M4 / M16 has a direct impingement system, which causes gases and other foreign material like dust and dirt to enter the chamber, causing jams. The HK416 has a gas operators short stroke piston operated rotating bolt, which does not cause jams.