Winchester Repeating Arms SX-AR (Historic Manual) - Manual (Page 8)

6
G enerAl D escription AnD o perAtion
D escription
The Winchester ® SX-AR is a gas-operated, semi-automatic
repeating rifle. The origins of the SX-AR can be traced
back to John M. Browning’s BAR, a rifle that served with
distinction through both World Wars, the Korean War and
other conflicts. The ergonomically-designed pistol grip
stock features comfortable dimensions to accommodate
most shooting styles.
o perAtion
When the trigger is pulled, the firing pin strikes the primer
of the cartridge, resulting in the rifle firing. Gas from the
fired cartridge travels down the barrel and some is diverted
into the gas piston which then sends the inertia block
rearward to operate the bolt. During the rearward
movement of the bolt, the empty cartridge case is ejected
out of the ejection port. If there is a cartridge in the
magazine, the bolt then returns forward by the force of the
recoil spring, picks up a cartridge from the magazine and
loads it into the chamber, ready to be fired. If there is not a
cartridge in the magazine during this movement, the bolt
lock engages and the bolt remains open.
With cartridges in the magazine and chamber, and the
“safety” in the off safe position, the rifle will fire a single
round with each successive pull of the trigger until the
magazine and chamber are empty. When the last round has
been fired, the bolt will lock in the rearmost, open
position. This allows fast, convenient reloading.
FIGURE 1
Bolt Bolt Handle MIL-STD 1913-Pattern Rails
MIL-STD 1913-Pattern Rail
Trigger Guard
Trigger
Pistol Grip
Forearm
Muzzle
Magazine
Barrel
Buttstock
Comb
Receiver
“Safety”
Magazine Release
Bolt Lock
Recoil Pad
09-056-WRA SXAR OM.indd 6 7/31/09 2:35:14 PM