TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 573 of 775

TM 9-2350-311-10

5-2 AUTHORIZED MUNITIONS — CONTINUED

5-2.4

M82 Primer

The M82 primer is the only primer authorized for firing in the M109A2/M109A3/M109A4 M185

and M109A5 M284 cannon assemblies. Do not fire the MK2A4 primer in these cannon

assemblies as it may cause misfires or equipment damage.

The M82 primer (1), which is loaded separately from the projectile, is inserted into the primer chamber. When the

cannon is fired, the firing pin strikes the primer which in turn ignites the propelling charge that moves the projectile

forward.

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