GENE SLOVERS
US NAVY PAGES

OP 820
40MM ANTIAIRCRAFT GUN
40MM MACHINE GUN MECHANISM
MARK 1 MARK 2 MARK 1, MOD 1 MARK 2, MOD 1
40MM GUN BARREL
MARK 1
40MM SIGHT
MARK 3 MARK 4
DESCRIPTION AND OPERATION
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IN THE PAGES OF OP 820 SHOWN HERE THE FOLLOWING PAGES ARE BLANK. PAGE 4, 10, 16, 40 AND 50
PRELIMINARY AI

PRELIMINARY BI
CHAPTER I INTRODUCTION
CHAPTER IIA MECHANISMCHAPTER IIB MECHANISM
CHAPTER III BARREL ASSEMBLY
CHAPTER IV SIGHTS
CHAPTER V CYCLIC OPERATION OF THE GUN MECHANISM
CHAPTER VI LOADING AND UNLOADING
CHAPTER VII CASUALTIES
CHAPTER VIII FUNCTIONAL CHECK-OFF LIST
CHAPTER IXA ASSEMBLY AND DISASSEMBLYCHAPTER IXB ASSEMBLY AND DISASSEMBLYCHAPTER IXC ASSEMBLY AND DISSASEMBLYCHAPTER IXD ASSEMBLY AND DISASSEMBLY
CHAPTER XA PARTS LISTCHAPTER XB PARTS LIST
CHAPTER XI APPENDIX
PRELIMINARY B1