7
#27Y407 THIS VERY INTERESTING GAGE
CHECKS THE RAIL ALIGNMENT ON THE RE-
CEIVER FOR MOUNTING THE DRUM MAGA-
ZINE IN THE MODEL OF 1928. NOTICE THE NTC
MARKING. IT IS MY GUESS THAT THIS IS THE
LOGO FOR THE COMPANY THAT MADE THE
GAGE (I.E. NATIONAL TOOL COMPANY?)
#2Y10-7 CHECKS THE LANDS IN THE BARREL. THIS IS A NO GO / GO GAGE. THE
SHORTER END IS THE NO GO.
#28-48 THIS NO GO/GO GAGE INSPECTS THE SPRING GUIDE SIDE OF THE 1828
BUFFER AND ALSO THE BUFFER FOR THE M1.