 The futuristic weapon that Colonel Moon uses during parts of the  chase after the opening sequence did really exist when the movie was  made, at least in prototype form. Its a Heckler and Koch OICW  (Objective Individual Combat Weapon), a weapon developed as the  futures infantry assault rifle as part of the US Armys "Soldier  2000" program. It consist of a grenade launcher mounted on top of a  regular 5.56mm (.223) caliber assault rifle, as well as a digital  camera within the optic sights. This digital camera is supposed to  be linked to a display within the soldiers helmet, enabling him to  look/shoot around corners, as well as transmitting live footage of a  combat situation to his troop commander or a higher superior.