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|  MIL-S-3443G (AR)
3.10.12 Trigger guard. The trigger guard shall be of metal
construction and shall have sufficient strength to prevent manual
deflection of the bow (causing actuation or blocking of the
firing mechanism) or any permanent deformation of the bow under
the following conditions: The bow of the trigger guard shall
withstand a static load of 220 pounds applied at the outside
surface of the trigger guard bow, perpendicular to the trigger
guard, at the midpoint of the bow and on the vertical center
plane of the shotgun.
3.10.13
Finishes.
3.10.13.1 Machine finish. Machine finishes shall be in
accordance with best commercial practice for the type of shotgun
In the event of a dispute over the comparison of
furnished.
finishes, referee comparison shall be in accordance with ANSI
B46.1.
3.10.13.2 Final protective finish. Unless otherwise
specified (see 6.2), the final finish of the exterior: of metal
parts shall be in accordance with the applicable finishes listed
below. the final protective finishes shall not apply to springs,
or spring pins which may be left bright. However,exterior
exposed surfaces of these parts are subject to the touchup
requirements in accordance with 3.10.14.
Finish
Material
5.3.1.2 or 5.3.2.2 of MIL-STD-171
Steel (other than corrosion
(see Note 1 and Note 3)
resisting steel)
3.3.2 or 3.3.3 of MIL-STD-171
Corrosion-resisting
steel
7.1.2 or 7.2.2 (dyed black) or
Aluminum and aluminum
7.5* (see Note 2) of MIL-STD-171
alloys
or MIL-A-8625, Type III, Class 1
or 2. Color of finished parts
shall be lusterless uniform dark
grey or black.
Finish number 5.3.2.2 shall not be used on steel
Note 1.
parts that are subjected to rolling or sliding
contact.
Note 2.
Coating thickness for finish number 7.5 shall be
0.0010 + 0.0002 inch.
MIL-C-16173 grade 1 of finish 5.3.2.2 shall not
Note 3.
be used.
14
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