
MIL-PRF-71140A (AR)
TABLE III. First article inspection
Examination or Test 1/
Conformance
Requirement
Inspection
Classification
Criteria
Paragraph
Method
Sample
Acc/Rej
Examination for defects
Table V
Table V
3.4.1, 3.7.5,
4.6.1.1, 4.6.4.5,
Table V
3.7.7, 3.7.8, 3.7.9
4.6.4.7, 4.6.4.8,
4.6.4.9
Projectile torque 2/
20
0/1
3.4.2
4.6.1.2
Major
Projectile extraction 2/
20
0/1
3.4.3
4.6.1.3
Major
Primer sensitivity 17/
14/
14/
3.4.6
4.6.1.6
Critical/ Major
3.5.1
4.6.2.1
Major
Chamber pressure 3/
-46o ± 3oC
50
N/A
21o ± 3oC
50
N/A
63o ± 3oC
50
N/A
Action time 3/
3.5.2
4.6.2.1
Major
-46o ± 3oC
50
0/1
21o ± 3oC
50
0/1
63o ± 3oC
50
0/1
3.5.3
4.6.2.2
Table VI
Function and casualty, metal parts security
-46o ± 3oC
4/
75
21o ± 3oC
75
4/
63o ± 3oC
75
4/
Dispersion
3.5.4
4.6.2.3
Major
Mann barrel
-32o ± 3oC
40
N/A
21o ± 3oC
N/A
40
52o ± 3oC
N/A
40
M242 autogun LR
-32o ± 3oC
N/A
40
21o ± 3oC
N/A
40
52o ± 3oC
N/A
40
Ballistic match (velocity) 3/
3.5.5
4.6.2.4
Major
21o ± 3oC
50
N/A
Time of flight
3.5.6
4.6.2.5
Major
21o ± 3oC
20
N/A
3.5.8
4.6.2.7
Major
Projectile trace (burn time)
-32o ± 3oC
45
0/1
21o ± 3oC
45
0/1
52o ± 3oC
45
0/1
Waterproofness
3.6.1
4.6.3.1
Minor
21o ± 3oC
20
0/1
3.6.2
4.6.3.2
Minor
Ruggedness 13/
-46o ± 3oC
240 12/
N/A
63o ± 3oC
240 12/
N/A
Salt fog
30
4/
3.6.3
4.6.3.3
Minor
Humidity
30
4/
3.6.4
4.6.3.4
Minor
See notes after Table IV.
4.4 Conformance inspection.
11
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