Page 159 - FAT 105 4.17 MOODLE

exposing empty channels for the new rounds.
The rotary box magazine is limited in its capac-
ity, typically featuring between 3 and 10 rounds,
depending on caliber. The biggest advantage of
the rotary magazine is its compact size and abil-
ity to fit flush within the firearm’s profile. The
biggest disadvantage is its limited capacity. A
rotary magazine design is used by the Ruger ®
10/22 semi-automatic rifle and carbine.
The detachable tubular magazine functions
exactly like the fixed tubular magazine, but
can be removed and replaced with a loaded
magazine. The detachable tubular magazine
Figure 9: Rotary magazine. differs from the fixed tubular magazine in the
fact that the tube itself can be removed from the
firearm by simply manipulating the magazine
magazine and the separator from the heli- release. The detachable tubular magazine will
cal magazine. The body itself is typically box- typically feature its own cartridge stop and
shaped, being squarer than a traditional box possibly interrupter. When the tubular magazine
magazine. The rotor rotates around a pin that is attached to the firearm, the action will trip the
runs through the center of the body parallel to stop and interrupter the same as the fixed tube.
the barrel. The rotor doubles as the follower and A variant of the detachable tubular magazine is
is powered by a torsion spring. The rotor fea- used with the SRM Arms 1216 semi-automatic
tures channels along its perimeter that separate shotgun. The SRM’s magazine features four
the rounds inside the body. When the magazine integral tubes that hold 4 rounds each, for a total
is loaded, the first round is pushed under the of 16 rounds capacity. The magazine rotates
feed lips into the first channel of the rotor. As similarly to a revolver’s cylinder automatically
the next rounds are loaded, the rotor will rotate, after each tube is empty.

Figure 10: A detachable tubular magazine.

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