The Zantetsu Sword is a knife that imbues your physical weapon attack with large waves of energy, powerful enough to destroy armored vehicles. It can cut through the enemy's bullets and weaponry, at the cost of a low ammo count, so use it wisely.

Unlike other secondary weapons, the Zantetsu Sword can only be fired sideways.


Game Difficulty Marco/Eri/Tarma/Clark Fio Ralf Leona
Metal Slug 6 Easy 20 30 10 N/A
Hard 10 15 5 N/A
Metal Slug 7/XX Beginner 20 30 10 24
Normal/Hard 10 15 5 12


  • Zantetsu (斬鉄, Zantetsu) is japanese for "iron-cutting", making this weapon an "Iron Cutting Sword". It is a popular weapon name encountered in many videogames, such as the recurring Zantetsuken (斬鉄剣, Zantetsuken) (also "Iron Cutting Sword") from the Final Fantasy series.
  • If equipped by Ralf, the power of Zantetsu Sword is much stronger.
  • If shot correctly, Zantetsu Sword is the strongest weapon in the Metal Slug Series.

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

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