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).
Most of the worlds' recent assault rifles are designed in bull-pup
configuration. This means that buttplate is attached directly to the
receiver
and handle with the trigger placed ahead of the magazine veil. The only
major
countries that still stick to conventional AR design are Germany (their
latest G36 looks a little bit more 'conservative', comparing to Austrian
AUG
or latest Israeli Tavor), and Russia, where latest ARs are developed in
both
'classic' (AN-94, AK-10x) and 'bull-pup' (Groza OC-14) styles.
The history of the concept of the assault rifle started in the early
1910's,
when the famous Russian armorer, col. Fedorov designed a small-bore
selective-fire rifle with detachable box magazine. Initially, Fedorow
designed a brand new small-caliber 6.5mm cartridge for his rifle, but,
due to
WW1, switched to the Japanese 6.5mm Arisaka load, which was less
powerful
than the Russian 7.62x54R and available in quantity. This rifle was
aquired
by the Russian army in small numbers in 1916 and served (in very limited
quantities though) with the Russian and Soviet (Red) Army up to 1925.
While
the design of the selective-fire rifle was not unique for that time, the
concept of the "lightened" cartridge, more suitable for full-auto fire,
was
new. Also, col.Fedorov invented the idea of infantry weapons families
(assault rifle, light machinegun, medium machinegun, vehicle and/or
aircraft
mounted MGs) based on the same actions and receivers.
The next step in this history was made by Germany - in the 1930's,
theybegan
research to develop a medium-power cartridge, which would be much
lighter
than 7.92mm German and easier to fire accurately in full-auto mode. This
development led to the 7.92x33mm cartridge (Pistolenpatrone 7.92mm). The
Germans developed some weapons designs for this load, including the MP43
and
Stg.44, but this was too late for Germany... Further development of such
designs was made by German engineers in Spain, and later in West
Germany, and
led to the HK G3/G41 family of battle&assault rifles.
The United States also put in some effort to this idea, and before WW2
developed a special less-than-medium powered cartridge .30Carbine and a
rifle
for this cartridge - a so-called "baby-Garand" in semi-auto M1 and
selective-fire M2.
But the largest stride forward was made by the USSR, when, in 1943, the
Soviet Army adopted a new cartridge - the 7.62x39mm medium-power load.
In 1945
, the Soviet Army adopted the semi-auto SKS rifle in this chambering,
and, in
1947 - the AK (known for the West as AK-47). The AK was Worlds' first
sucessful assault rifle, and one of the most widely used.
The Last major step on this road was made by US again - in the late
1950's,
the US Army adopted a new (for the US) concept of military
selective-fire
rifle using a small-caliber cartridge. The first of such weapons adopted
was
the Armalite AR15/Colt M16, designed by Eugene Stoner. This adoption
lately
set the new world trend for small-caliber (5.45-5.56mm / .22in.)
high-velocity cartridges.
All further research and development, such as caseless ammunition,
multiple-bullet or sabot cartridges, etc., still haven't produced any
practical results.