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The K-O3 Coupled Armored Vehicle is a trio of a transport supply vehicle, exclusive to Metal Slug Attack. It first made its debut on the game's event titled 'Try Line 3rd', where the boss can also become a playable unit.


Coupled armored vehicle developed independently by the Rebel Army. Fitted with special batteries in order to transport supplies safely to the battlefront. Damaged cars can be detached, and the vehicles can operate in one-car formation as well.

~Metal Slug Attack in-game description.


In Metal Slug Attack's event, this boss is fought at the last stage. The boss will attack the player's units with its cannon via coupled battery, its attacks are ordered by a Rebel Infantry which can be seen on the top of the boss.

The special attack of the boss will also fire 2 yet slow-moving cannon shots with its frontal battery (4 with MSA Skill small +.png 4). The projectiles combine together to form a bigger one before it collides on the ground to create a bigger explosion.

In-battle as a playable unit, once the first caboose has accumulated sufficient damage, the front car will perform a Metal Slug Attack-styled suicide attack charge. This however only happens when MSA Skill small +.png 3 is unlocked. The long range attack will also be modified in order to adjust for the remaining cars, however the special attack still remains the same.


K-03-Armored-Coupled-Vehicle-MSA-Idle.gif K-03 Coupled Armored Vehicle: The original variant.
K-O3-Armored-Coupled-Vehicle -MSA-Idle.gif K-03 Coupled Armored Vehicle+: A modified variant of original, boasting jet-black plating and crimson-tinted windows. The explosion from the unison projectiles has been removed in favor of poison mist that weakens enemies caught in the blast.
Frozen K-03 Coupled Armored Vehicle: A modified variant of the original, only containing one caboose. It's also painted blue to mimic the frozen weapons line. It launches shells at a greater range compared to its predecessors. Used by Rapid on special occasions.



  • The K-03 is based on the Bandvagn 206 Swedish articulated tracked vehicle, thought the K-03 is towing another vehicle instead of a specifically-designed trailer.
  • Its design resembles the Rebel Train from Metal Slug: 1st Mission.
  • In the game's files, it is known as "Renketu", a Japanese translation for 'Linking'.
Metal Slug TetsuyukiHairbuster RibertsTani OhShoe & KarnIron NokanaHi-Do
Mini-Bosses: Mini-BataAllen O'Neil
Metal Slug 2/X The Keesi II / Iron Nokana MK II (X) • Aeshi NeroDragon NosukeBig ShieeHozmiRugname
Mini-Bosses: Mosque ArtilleryThe Keesi II (X) • Karn (X) • Allen O'NeilDai-Manji
Metal Slug 3 Huge HermitMonoeye UFOJupiter KingSol Dae RokkerRootmars
Mini-Bosses: Twin Ohumein-CongaMonoeyesHairbuster RibertsHi-DoRugnameFake RootmarsClone Incubator
Metal Slug 4 Brave GuerrierToschka DalanueThe IronBig JohnSea SatanAmadeus Mother Computer
Mini-Bosses: Mecha Allen O'Neil
Metal Slug 5 Metal RearShooting RayScreamerSand MarineAvatar of Evil
Mini-Bosses: Black HoundStone Turtle (unused) • Gaia ElephantPtolemaios (unused)
Metal Slug 6 Bull DrillIron SentinelBrain RobotElder CentipedeInvader King
Mini-Bosses: Invader ControllerKing's Cocoon
Metal Slug 7/XX Iron Death WormCrablopsDestroyed CrablopsFall ClimberThe UnionRebel GigantKraken
Mini-Bosses: Scrap TowerBig Gate
Metal Slug: 1st Mission Rebel VTOLRebel TrainMacbaRebel ZeppelinElectromagnetic CraneWeapons Port BossMetal Strider
Mini-Bosses: Facility ElevatorMacbaRebel Truck
Metal Slug: 2nd Mission Big BerthaTerrain CarrierRebel ReactorMacbaRebel SubmarineTani OhWiredRebel AirplaneMetal StriderRocket UFO
Mini-Bosses: Power GeneratorsRebel RocketHyakutaro
Metal Slug Advance FormorEmain MachaKaladgolgThe Keesi IIICabracan
Mini-Bosses: Allen Jr.
Metal Slug 3D ParachuetruckMosque ArtillerySpider-BotUnderground Cruise MissileMorden's BattleshipMorden's CastleAllen O'NeilLugusLieu
Metal Slug Attack Pharaoh's ArcPtolemaiosBall SlugGreat MotherMars GigantalosK-O3 Coupled Armored VehicleLand BlowfishCyclobsterSlug SquareZoni DolomaQuadro JumperDenturionD-GuFortmeranianRock MoleGiant CopterEt A OmnisVortexDigger BaseCrusty LegsArmored CrawlerQueen Big Snail7000 Class LocomotiveRiviere HyllMetal Fusioner No.223Drum SlugMars WolfSea DragonTetsujin SquadLa TorneGigantnoidDark GateKnight TankImpact CannonDive Assault Cannon Andrew
Mobile games Rocket Control RoomUnknown AlienHellfireSpiderbotCyclopsMega Laser TurretMars Battle UFOM-32 Water Carrier PlaneKouraiAlien Floating Structure