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Page Title:
Front band and stock ferrule clearance |
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|  MIL-R-45979
3 . 2 . 1 6 . 5 Front band and stock ferrule clearance. There shall be
1/64-inch minimum clearance between the front band and stock ferrule (see
Drawing J7790476).
3 . 2 . 1 6 . 6 S w i v e l s . The butt swivel shall be fastened securely to
the stock by the long butt plate screw. The sling swivel assembly shall
b e fastened securely to the stock by rivets. There shall be no relative
movement of these parts except that the swivel loop shall rotate using
l i g h t finger pressure.
3.2.17 Soundness of weld. The welding of the selector shaft and
the sear release to the receiver shall show good fusion. The weld and
w e l d e d parts shall be free of cracks, porosity, inclusions and other
m e t a l l i c d i s c o n t i n u i t i e s , T e s t i n g shall be as specified in 4.5.10.2.
3 . 2 . 1 8 Tightness of draw. When the barrel is drawn into the
receiver, the breakaway torque shall not be less than 80-foot-pounds.
T e s t i n g shall be as specified in 4.5.10.3.
3.2.19 Headspace. A f t e r proof firing, the headspace shall be
1.6355 inches minimum to 1.6385 inches maximum. Testing shall be as
s p e c i f i e d in 4.5.10.4.
3 . 3 Performance characteristics.
3.3..1 Firing
p i n indent. F i r i n g pin indent shall be .016 inch
minimum, shall not
cause pierced primers, and shall not be off center
m o r e than one-half
the diameter of the firing pin point. Testing shall
b e as specified in
4.5.10.5.
3 . 3 . 2 T r i g g e r p u l l . T h e trigger pull shall be free of creep, and
s h a l l be within the range of 4 1/2 to 6-pounds. Creep shall be inter-
preted to mean any perceptible rough movement between the time the
trigger slack is taken up and the hammer is released. Testing shall be
a s specified in 4.5.10.5.
3 . 3 . 3 High-pressure resistance. R i f l e s shall withstand the proof
firing of one Government standard 7.62mm. M60 hiqh-pressure test cart-
r i d g e . C a r t r i d g e s shall be in accordance with MIL-C-46477. Testing
s h a l l be as specified in 4.5.10.6.
3 . 3 . 4 F u n c t i o n i n g . Rifles shall be capable of only semiautomatic
f i r e , and shall operate without malfunctions or unserviceable parts.
Rifles shall be function fired using Government standard 7.62mm, M118,
NATO match cartridges. Cartridges shall be in accordance with
M I L - C - 4 6 9 3 4 . Testing shall be as specified in 4.5.10.6.
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