Manual

(1)
(2)
b. The daily inspection should also reveal any
defects such as burred, worn, or cracked parts.
Defecta should be reported to the armorer for
correction
c. A muzzle plug should never be used on the
rifle. It causes moisture to collect in the bore,
which causes bore rust that is a safety hazard.
o?. Obtaining the proper rear sight tension is
extremely important ;
without it the sight will
not hold its adjustment in elevation.
During nor-
mal maintenance and prior to firing, the rear sight
must be checked for correct sight tension. The
indications of improper sight tension are: eleva-
tion knob extremely difficult to turn, and eleva-
tion knob turns freelv without an audible click.
If the elevat”ion knob is extremely dif-
ficult to turn, the soldier must rotate the
&age knob nut (with the screw-driver
portion of the Ml0 cleaning rod handle)
counter&xkwise blue c2ick at a time.
After each click an attempt should be
made to turn the elevation knob. Repeat
this process until the elevation knob can
be turned without extreme difficulty.
In the event the elevation knob is ex-
tremely loose and the rear sight aperture
will not raise, the &&age knob nut must
be turned in a clockzlrise direction, one
click at a time, until the aperture can be
raised.
(3) To check for proper tension the proce-
dures listed below should be followed:
(a) Raise the aperture to its full height.
(5) Lower the aperture two clicks.
(0) Grasp the rifle with the fingers around
the small of the stock (fig. 36) and ex-
ert downward pressure on the aperture
with the thumb of the same hand.
(4) If the aperture drops, sight tension must
be adjusted. To do this the windage
knob nut must be turned in a clockwise
direction one click at a time until the aper-
ture can no longer be pushed down (fig.
36). If the proper tension cannot be ob-
tained, the rifle must be turned in to the
unit armorer.
24. Special Maintenance
a. Before firing the rifle, the bore and the cham-
ber should be cleaned and dried.
A light coat of
oil should be placed on all other metal parts ex-
cept those which come in contact with ammunition.
b. Before firing, rifle grease should be applied
to the parts indicated in figure 33. A small
amount of grease is taken up on the stem of the
grease container cap and is applied at each place.
Rifle grease is not used in extremely cold tempera-
Figure 36. Proper utght tendon.
24