AR 21 is not a good rifle.There are still some problems as
reflectd by some forumers here,if their views reflecting the
general performances of SAR 21.
But it is the best SAR 21 SG can offer,based on the CURRENT
technology avaiable to SG and funding .
Some may offer ideas to wait for new technologies mature then SG
make a better rifle.No country can afford to wait defending her
people.A ready product is much better than a very advanced
rifle,but appearing only in the monitor!!
Whether u like to hear or not,SAR 21 combine the features
of ''
modified Kalashnikov/ Stoner operating system,''
Just to refresh u guys about SAR 21:
''...The
trigger mechanism is excellent with a relatively light, crisp
release - which we estimate to be around 2.3kg -with little creep
or backlash. This is accomplished via a stiff sliding plate that
links the trigger and fire-control unit, rather than a flexible rod
or similar mechanism used in some bullpup designs that result in a
heavy and sluggish trigger pull.
The SAR-21 uses what might best be described as a modified Kalashnikov/ Stoner operating
system, with a long Kalashnikov-style operating rod in a gas
tube over the barrel and a Stoner-style unitary bolt carrier with
firing pin, retained cam pin and bolt. This melding of two proven
operating systems should be extremely reliable and robust.
The gas port settings are adjustable without tools to compensate
for heavy use. Adjustment is accomplished by simply lifting the gas
regulator and rotating the adjustment knob to one of its three
settings. The bolt itself is of the conventional rotating type, its
two massive lugs locking into recesses in the barrel extension. The
polymer receiver therefore, receives little
stress.....''

http://www.enemyforces.com/firearms/sar21.htm

http://world.guns.ru/assault/akm_cut.jpg

<!--[endif]-->
M 16A3 receiver X ray image.Aluminum parts in
blue color,steel are balck.
http://world.guns.ru/assault/m16a3xray.jpg
http://world.guns.ru/assault/as18-e.htm#tech

http://home.comcast.net/~sfischer397/index.htm
http://home.comcast.net/~sfischer397/stoner/receiver.htm
2.Question
What
is
''a
Stoner-style unitary bolt carrier with firing pin, retained cam pin
and bolt.''
any cross section,video clip etc can help to explain