The U.S. Army is looking for a new weapon for infantry troops. After a half-century of using the M16/M4 carbine series of weapons, the Army is looking for a weapon with increased range and lethality to deal with future threats. Although the search is still in its early stages, looking at the threats and the current state of small arms technology we can get an idea of what the service might shoot for — figuratively speaking — in a new soldier weapon.