HK416

The HK416 is a German assault rifle developed by Heckler & Koch, introduced in the early 2000s, built around the external dimensions and magazine compatibility of the American M16 and M4 rifle family but replacing the original design's direct gas impingement operating system with a short-stroke gas piston mechanism adapted from Heckler & Koch's earlier G36 rifle, intended to reduce fouling and heat inside the receiver and improve reliability, particularly in the dusty and sandy conditions American special operations units had encountered in Afghanistan and Iraq. The United States Army's Delta Force special operations unit was an early adopter, and the rifle subsequently saw wider adoption among other special forces and conventional units of multiple countries seeking a more reliable alternative or upgrade to standard AR-15-pattern service rifles. The design gained significant public attention after being publicly identified, though never officially confirmed by the U.S. government, as the type of weapon used by U.S. Navy SEAL Team Six during the 2011 raid that killed Osama bin Laden.