Heckler & Koch HK416 is a rifle largely based on what variant of the M16A2?
Heckler &amp; Koch HK416 The Heckler & Koch HK416 is an assault rifle/carbine designed and manufactured by Heckler & Koch. Although its design is in large part based on the AR-15 class of weapons, specifically the Colt M4 carbine family issued to the U.S. military, it uses an HK-proprietary short-stroke gas piston system originally derived from the ArmaLite AR-18 (the same system was also used in Heckler & Koch's earlier G36 family of rifles). The HK416 gained fame as the weapon that United States Navy SEALs from DEVGRU Red Squadron used to kill Osama Bin Laden in 2011.
Heckler &amp; Koch UMP The UMP ("Universale Maschinenpistole", German for "Universal Submachine Gun") is a submachine gun developed and manufactured by Heckler & Koch. The UMP has been adopted by various agencies such as the U.S. Customs and Border Protection. Heckler & Koch developed the UMP as a lighter and cheaper successor to the MP5, though both remain in production.