Dodac N

Assembly Dwg. No. 8840362

Preparation for Firing:

No preparation is required. Limitations:

None.

References:

TM 9-1300-251-20 SB 700-20 AMC-P 700-3-3 TM 9-1025-200-12&P

PRIMER, ELECTRIC AND PERCUSSION: MK15, MODS 2 AND 3

'Type Classification:

Std OTCM 37119 dtd 1959

Use;

This primer is used with a variety of separate-loading ammunition rounds to initiate burning of the propelling charge. The primer can be activated either by percussion from a firing pin, or by an electric current.

Description:

Primer MK15, Mods 2 and 3, is a brass cylinder with an extraction flange base. A charge container loaded with 30 grains of black powder is threaded into the case. The base contains a firing plunger assembly, a primer cap of sensitive primer compound, and an electrical resistance wire embedded in gun cotton, The plunger assembly is insulated electrically from the case, except for the resistance wire connecting the two parts.

Functioning:

The primer is inserted into the firing lock of the weapon. In the percussion mode, the firing plunger is struck by the firing pin, and the integral tiring knob crushes the primer cap. Flash of the primer compound flashes to the gun cotton and the black powder to initiate burning in the propelling charge. In the electrical mode a current induced by the electrical firing mechanism of the weapon is introduced into the firing plunger. Since the plunger is otherwise insulated from the case, the current flows through the resistance wire to the case. The resistance wire heats up to ignite the gun cotton and black powder.

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