Graduation Gift. Beretta Px4 Storm & 200 Winchester full metal jacket rounds

[PanzerJaeger]

EDIT: The M16 is that badly designed. That's actually... yeah. How did that enter service, now?

No firearm should be fired under water or full of water. Not even the venerable AK performs reliably. As such, the weapon's performance in such conditions is not indicative of the robustness of its design. The AR was revolutionary when it was designed and has stood the test of time very well. It pushed militaries around the world to adopt similar systems. The AR has actually eclipsed the AK in worldwide adoption, and is used by more special forces units around the world than any other system. Piston ARs and other third generation assault rifles do improve upon it in several ways, but only incrementally. The reason why the US military has not adopted a new service rifle is because nothing has outperformed the AR in a great enough way to justify a switch.

@MRD

The early failures of the AR in Vietnam were due to the pentagon switching the type of powder used from that which Stoner designed the rifle around. In short, it gummed up the bolt and bolt carrier causing jams. That reputation for jamming has followed the rifle ever since, even though the modern AR is a very reliable platform.