Military

Machete
Magazine
Manhattan Project
Mercenary
Metal Gear (TX-55)
Metal Gear G
Metal Gear RAXA
Metal Gear RAY (manned)
Metal Gear RAY (unmanned)
Metal Gear REX
Microfilm
Military Analyst
Military Industrial Complex
Military Regime
MIRV
MO Disk
Motion Detector
Motion-Sensing Radar
Muzzle Blast
Naked Gun (MGS4)
Naked Nuke (MGS4)
Nanomachine Inhibitor (MGS4)
NARC (MGS4)
NBC weapons
Night Vision Goggles
Nuclear-Armed Bipedal Walking Tanks
OctoCamo Suit (MGS4)
Order of Lenin
Outer Haven (MGS4)
Oxygen Tank