Troops of B Company of the Royal Australian Regiment wade across a river in Phuoc My province, southeast of Saigon, June 22, 1970.

5. FN FAL
Type: Semi or Fully Automatic Rifle
Country of Origin: Belgium
Caliber: 7.62 x 51 mm (.30 inch)
Cartridge Capacity: 20 rounds
Muzzle Velocity: Approximately 2,700 feet per second
Rate of Fire: 650-700 rounds per minute

Inspired by the Sturmgewehr 44, the Belgian manufacturer Fabrique Nationale (FN) originally developed the FAL around the same intermediate round used by the German gun, but when NATO issued the requirement for the longer 7.62 mm, FN altered the design and created a heavy hitter that packs a punch -- and a potent kick. The FAL soon became one of the classic weapons of the Cold War, used by over 50 countries, even if it proved tough to handle in full auto mode. The rifle gave good service to the Australian army in the jungles of Vietnam, to Israeli troops during the Six-Day War and was used by both sides in the fight for the Falkland Islands.

VIDEO: See the FN FAL assault rifle in action.
PUZZLES: Put together these combat rifle puzzles.