The M-3685 is a secondary weapon from the Regular Army on the Metal Slug Series.


The Sub-Machine Guns are made to give a soldier more range and fire power than a pistol, while still enough mobility to maneuver around a battle field than a full sized rifle.

The M-3685 is specifically made not only to provide the troops with those crucial parts, but to provide substantially more firepower than a standard submachine gun. Designed to be able to handle more powerful caliber rounds, this gun is an excellent choice for soldiers who wish to carry tremendous amounts of fire power while still able to move around easily.


  • The M-3685 resembles the Heckler and Koch MP5 Submachine Gun
Standard Handgun (Murder .50AE | Murder Model-1915 .38 Mk.1Am) | AR-10 | M-3685 | M60
Limited Heavy Machine Gun | Rocket Launcher | Flame Shot | Shotgun | Laser Gun | Iron Lizard | Super Grenade | Enemy Chaser | Drop Shot | Two Machine Guns | Zantetsu Sword | Thunder Shot

Machine Gun | Special Shot | Grenade Gun | Missile Pod | Bazooka | Sniper Rifle

Bombs Grenade | Fire Bomb | Stone | Earring Bomb | Smoke Bomb | Monolith | Snowball
Melee Knife | Tonfa | Hatchet | Tomahawk | Punching Glove | Stun Gun | Wrench | Vulcan Punch | Argentine Backbreaker | Moon Slasher
Other AA Machine Gun | Thunder Cloud | Mobile Satellite