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|  MIL-P-71012A(AR)
3.3.15 Human-Engineering. The pistol shall be in general
conformance to the human engineering requirements of MIL-STD-1472
and MIL-HDBK-759, and shall meet with the approval of the
Government for human engineering characteristics. With the trigger
in its forward most position, there shall be space for a 22 mm
(7/8 inch) diameter rod to move freely between the front of the
trigger and the trigger guard. Additionally, there shall be no
sharp edges on which to snag clothing.
3.4 Performance
characteristics.
3.4.1 Headspace. The headspace shall be 1.915 centimeters
(cm) to 1.950 cm. Headspace is defined as the distance from the
breech face of the slide-in the battery position to the surface in
the chamber which stops the case mouth.
3.4.2 Trigger pull. For safety considerations, the pistol
shall provide an uncocked trigger pull of 4.0 to 7.3 kg (8.8 to
16.1 lbs) for the first round. For accuracy purposes subsequent
rounds shall be fired with trigger of pull of 1.8 to 2.9 kg (4.0 to
6.4 lbs)
3.4.3 High
Pressure
resistance-
3.4.3.1 Pistol. Each complete pistol produced for delivery
to the Government, with all parts assembled to the receiver, shall
withstand the firing of one M905 high pressure test cartridge.
The barrel, slide and all parts subjected to direct pressure shall
be free of firing-induced defects after proof firing as evidenced
by magnetic particle inspection (MPI) per MIL-STD-1949 for ferrous
metal, dye penetrant inspection (DPI) per MIL-STD-6866 for non-
ferrous metals, and by visual examination. Other parts and
surfaces shall be visually inspected for evidence of firing-
induced defects or damage.
3.4.3.2 Repair parts. Firing-pressure affected parts
produced for delivery to the Government as repair parts (the
barrel, slide and other parts designated by a Government
representative] shall withstand the firing of one M905 high
pressure test cartridge. These parts shall be free of firing-
induced defects after proof firing, as evidenced by MPI or DPI (as
appropriate) and visual inspection."
3.4.4 Functioning. Pistols shall
operate without stoppages
unservicabile parts when firing M882
9MM ammunition and
commercial 9MM subsonic and supersonic
controlled expansion
ammunition when tested as specified in
4.6.4.
3.4.5 Accuracy
and
dispersion.
3.4.5.1 Accuracy (targeting) At a range of 25 meters, all
shots of a series of 8 shots shall fall within, or cut the edges
of, a 34 cm (13.4 inch) diameter circle when using the center of
the circle as point of aim and firing M882 ammunition.
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