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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29

MIL-K-70606 (AR)

4.6 Methods of Inspection.

4.6.1 Cutting test. The MPBS shall cut barbed wire a minimum of 50 times as specified in 3.4.1. The cuts shall be made in one motion without resharpening. The MPBS shall cut a standard metal band as specified in 3.4.1. in one motion.

4.6.2 Corrosion resistance. Three (3) MPBS shall be selected from each lot. The bayonet shall be removed from the scabbard and all metal parts shall be coated with oil per MIL-L-63460. The

test shall be performed as specified in ASTM-B-117. The time of the test shall be three hours. Test procedures and equipment shall have prior approval of the Government. If any part shows evidence of corrosion, it shall be classed defective and the lot shall be rejected.

4.6.3 Resiliency test. The MPBS shall be tested using a contractor designed, Government approved test fixture. The blade shall be clamped in the fixture such that one and one-half inches of the pointed end of the blade is rigidly held. The grip end of the bayonet shall be slowly deflected through a minimum arc of

1-1/4 inches to the right and 1-1/4 inches to the left of the vertical center of the blade. On each bend, the bayonet shall be held at the extreme deflection for one second and then,slowly released. Blades having a set of 3/16 inch or less shall be straightened before being returned to the lot.

4.6.4 Impact. The bayonet shall be held with the blade point in an upward position in a Government approved fixture of contractor design simulating the applicable rifle (See Figure 1, 2 and 3). A weight, with a block of soft, untreated maple wood attached, shall be dropped on the bayonet knife point from a

height of 12 to 18 inches. The surface of the wood block shall be

positioned so that the blade penetrates across the woodgrain. The weight and height shall be such that a minimum of 28 foot-pounds of energy is applied on impact.

4.6.5 Twist. The bayonet shall be clamped in a contractor designed, Government approved fixture simulating the applicable weapon (See Figures (1, 2 and 3). The blade shall be twisted at a point 1.500 ± 0.125 inches from the guard. Bending of the blade along the longitudinal axis shall be minimized. The bayonet shall

be given one twist of a minimum of 25 foot-pounds torque. The

torque shall be applied uniformly in both the clockwise and the counter-clockwise directions.

4.6.6 Withdrawal. The bayonet shall be clamped in a a contractor designed, Government approved fixture simulating the applicable weapon (See Figures 1, 2 and 3). A minimum tensile

load of 250 pounds shall be applied gradually in the longitudinal

direction.