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Page Title:
Bolt assembly and operating rod action |
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|  MIL-R-45979
3 . 2 . 3 Bolt assembly and operating rod action. W i t h the firing
mechanism, stock and operating rod spring disassembled from the rifle,
the bolt assembly, with the operating rod connected, shall move of its
o w n weight in either direction through its full range of travel in the
receiver when the axis of the rifle is manually changed from the hori-
zontal to approximately 60 degrees elevation and depression.
3 . 2 . 4 Bolt Assembly. The bolt assembly, with the operating rod
d i s c o n n e c t e d , shall move through its full range of travel in the receiver
w i t h o u t binding and when in the fully locked (forward) position, the
b o t t o m surface of the right hand locking lug shall seat on the receiver.
Firing pin protrusion shall be .044 inch minimum to .060 inch maximum in
t h e forward position.
3 . 2 . 4 . 1 Bolt and roller assembly. The bolt roller shall be re-
t a i n e d on the bolt by the retaining ring and shall rotate without binding
o n the bolt shaft. The bolt and roller assembly shall be proof and
magnetic particle inspection marked in accordance with Drawing J7790476.
3 . 2 . 4 . 2 E j e c t o r . T h e ejector shall be retained in the bolt by the
e x t r a c t o r shank and shall be held in the forward position by the ejector
spring.
T h e ejector shall move through its full range of travel under
s p r i n g action without binding in the bolt and shall eject cartridge cases
c o m p l e t e l y out of the rifle when the rifle is function fired or manually
operated.
W h e n the rifle is function fired, the ejection pattern shall
b e from 15 to 90 (12:30 to 3:00 o'clock) to the right of the longitu-
dinal axis of the rifle.
3 . 2 . 4 . 3 E x t r a c t o r . T h e extractor shall be retained in the bolt by
the extractor-d plunger assembly. The extractor shall move
t h r o u g h its full range of travel under spring action without binding,
a n d shall extract cartridge cases from the barrel when the rifle is
f u n c t i o n fired or manually operated.
3 . 2 . 4 . 4 F i r i n g p i n . T h e firing pin shall be retained in the bolt
by the extractor shank and shall move of its own weight through its full
r a n g e of travel in the bolt.
3 . 2 . 5 B o l t s t o p . The bolt stop shall be retained on the receiver
by the spring pin and shall be held in the "down" position by action of
t h e bolt stop spring. T h e bolt stop shall move through its full range
of travel, and when positioned manually or by action of the magazine
f o l l o w e r , it shall hold the bolt in the open (rearward) position. The
b o l t stop shall disengage from the bolt by action of the bolt stop spring
when the magazine follower is disengaged, and the operating rod is
retracted.
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