6
#27Y18 CHECKS THE
LOCATION OF THE
HOLE IN THE FRONT
OF THE RECEIVER
WHICH IS USED TO
MOUNT THE BARREL.
ONE SIDE OF THE GAGE
CHECKS THE UP AND
DOWN LOCATION OF
THE HOLE AND THE
OTHER END CHECKS
THE LEFT TO RIGHT
ALIGNMENT.
#27M64 (THE LETTER "M" IN THE
NUMBERING REPRESENTS THE
GAGE IS FOR THE M1 THOMPSON
SERIES) THIS GAGE CHECKS THE
LOCATION OF THE HOLES IN THE
RECEIVER FOR THE EJECTOR.
THE RECEIVER IS LAID UPSIDE
DOWN INTO THE GAGE AND THE
TWO PINS THEN MOVE INTO
PLACE.
#27Y71-2 THIS GAGE
CHECKS THE EJECTOR'S
HOLE THREAD PATTERN
IN THE RECEIVER.
#27Y71-8 THE CYLINDRI-
CAL GAGE WHICH IS
ALONGSIDE THE -2 IS
USED TO CHECK THE
THREADS ON THE EJEC-
TOR.