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MIL-M-45013E (AR)
3.3.1.3 Flash suppressor (7269034). The flash suppressor
shall be fastened securely to the barrel assembly (7269028) by
the staked pin (12599983) so that there shall be no relative
movement.
3.3.1.4 Gas cylinder extension (7269030), nut (7269031) and
plug assembly (9362515). The gas cylinder extension and nut
shall be assembled securely to the gas cylinder (7269036) so that
there shall be no relative movement and shall be retained by the
lock washers (7269035). The gas cylinder plug assembly shall be
assembled to the gas cylinder and shall be retained by the
captive lock washer (9362513).
3.3.2 Rear sight assembly (77914371). The rear sight base
assembly (7269278) shall be staked securely to the dovetail
recess of the receiver assembly (11686308), after targeting and
accuracy firing test, so that there shall be no relative movement
of the rear sight base assembly. The rear sight leaf assembly
(7269279) shall move manually between the horizontal and vertical
positions and shall be held in the vertical position under spring
action until manually changed. When the elevation release
assembly (7269292) is depressed the aperture slide (7269289)
shall move without binding in the leaf (7269290) and when the
elevation release assembly is released the aperture slide shall
be held in position under spring action. The elevation
adjustment knob (7269291) and windage adjustment screw (7269281)
shall turn manually through their full range of travel and shall
produce position retention perceptible by touch for each detent
notch when the rear sight assembly is adjusted. When the
elevation adjustment knob is rotated, the aperture slide shall
not cant.
3.3.3 Barrel lock (110101841. When in the locked position,
the barrel lock shall be capable of being manually unlocked by
the application of finger pressure to the barrel lock retaining
ring (11010377) so that the barrel lock iS moved through its full
range of travel to the right. When unlocked, the barrel lock
shall be capable of being pivoted manually between the closed
(horizontal) and open (vertical) positions. It shall be held in
the open position by spring action permitting the barrel assembly
with biped assembly (7269027) to be assembled to or disassembled
from the receiver assembly (11686308). When the barrel lock is
returned to the closed position it shall lock under spring
action. When in the colsed position, the barrel lock shall be
capable of retaining the barrel assembly with biped assembly in
the receiver assembly.
6

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