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Some reference material...
M19 Manual: 3.4.1 Firing pin protrusion. Protrusion of the firing pin from the face of the base plug bushing shall be as follows:
a. Drop-fire: 0.047 to 0.101 inch, incl.
b. Lever-fire: 0.085 to 0.101 inch, incl
MIL-M-10008F (AR)
24 SEPTEMBER 1984
SUPERSEDING
MI L-M-1OOO8E
25 June 1975
MILITARY SPECIFICATION
MORTAR, 81MM: M29A1
3.4.5 Firinq pin protrusion. Protrusion of the firing pin from
the face of the plug shall be 0.090 to 0.096 inch.
MVP
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