The Middle-Son 1986 is a naval vehicle from the Regular Army or Rebel Army.
The Middle-Son 1986 is an old U-Boat submarine used by the Regular Army. Even though a more advanced variant was created, it is still used frequently, even though it's very outdated. It can carry a lot of weapons such as missiles and torpedoes, and has an anti-aerial machine-gun turret on its hull. Its impressive HP is very outstanding able the army or players to stand still even bombs are exploding and the turret as a support mechanism. This boat is only used to transport the Regular Army to the other side of the Straits of Traven, where the Rebel Army leader General Morden awaits.
- It is based off a German U-Boat or the USS "Gato" Class Submarine.
- It is unknown if the number indicates it was constructed in the 1980s or otherwise.
|Mechanized||SV-001 (Metal Slug) | SV-001 Type-R | Slug Copter | Slug Flyer | Slug Sub | Astro Slug | Slug Gunner | Slugnoid | LV Armor | Walking Machine | Slug Mariner | Drill Slug | M-15A Bradley | Metal Claw | Forklift | Slug Mobile | Augensterm | Protogunner | Slug Digger | Slug Trolley | Slug Armor | Slug Gigant | Golden Slug | MS-Alice | Ball Slug | Slug Square|
|Animal||SV-Camel | Elephant Slug | Ostrich Slug | Donkey Slug|
|Other||Middle-Son 1986 | Middle-Son 1999 | SV-002 | Borobune Slug | Motorcycle | Parachute Drop | Drop Pack | Regular Army Helicopter | Landseek | PA33-21 Boat | RA-TTT | Rootmars|