Mk19 Bore Constriction Gage

Appropriate eye protection is recommended when cleaning the weapon and/or its parts.

a. Clean the bore and chamber. Then screw the bore constriction gauge (3) onto the tip of the cleaning rod. Insert the gauge into the flash suppressor to ensure any dents do not affect its functioning. If the gauge will not pass through the flash suppressor, remove the flash suppressor. Continue inserting the gauge into the bore all the way through the chamber. Verify the bore constriction gauge passes through freely, if not replace the barrel.

ASSEMBLY

1. INSTALL FLASH SUPPRESSOR AND SLOTTED SPRING PIN.

Screw the threaded end of the flash suppressor (1) all the way into the smaller end of the barrel (2) until none of the threads are showing. Then slightly reverse rotation (flash suppressor) until you can see through both pin holes in the flash suppressor. This indicates the holes are aligned with the flat (3) threaded surface of the barrel.

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