MIL-K-70606 Knife, Bayonet, Multipurpose, M9 with ScabbardThis specification covers the M9 Multipurpose Bayonet System MPBS. This system is comprised ofa multipurpose knife which functions as a bayonet, field craft knife, combat knife and wire cutter and is carried in a detachable scabbard which may also SClVC as part of the wire cutter. The term bayonet, hereinafter mentioned in this specification, shall be the multipurpose knife described above.

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Group IX

MIL-K-70606 (AR)

Group X

Attaching Assembly, Load Spring Catch - 7160949

Bearing Equipment End Pin, Spring - Tubular, Slotted

(12598195) MS16562-129

Hexagon Socket Button

ASME/ANSI B 18.3

Head Cap Screw - .190-24x.44

.190-32x.69

.190-32x.75

Screw, Machine - MS51959-27B

NOTE : Parts inadvertently damaged during interchange may be replaced without penalty when authorized and verified by the Government representative witnessing the test.

4.6.10 Latching mechanism functioning. The MPBS shall be tested using a contractor designed, Government approved test fixture (See Figures 1, 2 and 3). The MPBS shall be assembled to the test fixture without manually depressing the latching lever.

The MPBS shall then be detached by manually depressing the latching

lever.

4.6.11 F iring.

The bayonet shall be attached to an M16 series

Rifle. The weapon shall be hand held. A total of 90 rounds consisting of three 30 round magazines shall be fired at the maximum rate of fire. Upon completion of the test, the bayonet shall be examined for damage or looseness. This test will be conducted at a Government facility.

4.6.12 Serrated edqe. The serrated edge shall be used to make

a minimum cut 18 inches long in the material specified in 3.4.12.

A sawing motion shall be used. The time shall not exceed one hour. Upon completion, the serrated edge shall be used to cut

one-half inch hemp rope.

4.6.13 Temperature extremes. The MPBS shall be conditioned in a Government approved test chamber at the temperature specified in

3.4.13 for a minimum of two hours before testing begins. After the MPBS is removed from the chamber, testing shall begin immediately. After each test the MPBS shall be returned to the test chamber and reconditioned for a period of one hour.

4.6.14 Hardness. Five (5) blades shall be selected from each heat treatment batch (see Note). The test shall be performed as specified in ASTM-E18. The scale used shall be the 15N scale. The reading shall then be converted back to the Rockwell C scale. Each heat treat batch shall remain segregated until completion of all required tests. If any blade fails to comply with the specified heat treatment and hardness requirement, the blade shall be classified defective and the lot shall be rejected.

NOTE : A heat treatment batch shall be defined as blades that have been heat treated at the same time in the same furnace and quench bath for each of all phases of the entire heat treatment process.

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