Page 75 - FAT 105 4.17 MOODLE

it resets, then another round can be fired. When
Semi-Automatic and the trigger is pressed with an automatic action,

Automatic Action the firearm will continue to fire until the trig-
ger is released or the feeding device is empty.
Regardless of being semi or automatic, the rest
of the cycle of operations will remain the same.
Unlike manual actions, which require the op-
erator to perform many of the steps of the cycle BLOWBACK OPERATION
of operations, semi-automatic and automatic
The blowback-style action is so named because
actions are almost completely automated. They
of the fact that the energy from the discharging
rely on the energy and pressure generated by
cartridge simply blows the bolt/slide backward,
the discharging cartridge to unlock the cham-
automatically completing many of the steps in
ber, extract and eject the empty case, cock the
the cycle of operations. The blowback-style ac-
hammer/striker, and feed and lock the chamber
tion is used with pistols, rifles, and shotguns.
once again. The operator only needs to load the
With an empty and locked action, the cycle of
firearm or insert a loaded feeding device. Once
operations for a semi-automatic blowback-style
all of the cartridges have been fired, the firearm
action firearm is as follows:
can simply be reloaded.
• Depending on specific model, the
The difference between semi-automatic and
firearm is loaded, either directly into an
automatic actions lie mostly in the fire control
internal fixed magazine or through a
group. With a semi-automatic action, when
removable magazine. (1)
the trigger is pressed the firearm will fire one
round, and the action will cycle. To fire another
• The operator must manipulate the action
round, the trigger will need to be released until
by means of charging handle or slide.

Figure 1: Semi-automatic firearms.

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