Automatic Rifles or Assault rifles are primary offensive weapons of modern troops. Today`s AR (Assault Rifles) usually have calibers ranging from 5.45mm to 7.62mm, magazine capacity of 20-30 or more rounds, selective full auto and single shot modes of fire, plus, in some models, 2 or 3 round burst mode. Effective range of fire is some 600 meters or so; effective rate of fire - up to 400-500 rounds per minute in full auto mode. Many assault rifles shown here are, in fact, parts of whole families of assault firearms (from short carbines to light machineguns - Steyr AUG is a good example). Almost all AR`s may be equipped with bayonet, optical or Night Vision scope/sight and, some of them, with underbarrel grenade launcher or rifle grenade launcher (rifle grenades usually are put on the barrel and fired with a blank cartridge). Todays trends in AR design are wide usage of hardened plastics and lightweight alloys and built-in holographic (collimator) or optical scopes with magnitfication of 1X to 4-6X (usually 1X or 1.5-3X).