World Trigger Wiki
World Trigger Wiki
No shield, no problem!

Sumiharu Inukai, after Masataka Ninomiya breaks the Idras' shield with Gimlet.[1]

Kanji 徹甲弾
Rōmaji Gimuretto
Organization BrDr.png Border
Type White trion.png Normal (Composite Bullet)
Classification GU.png Gunner (Gunner.png + Gunner.png)
- Enhanced penetrative power
First Appearance
Manga Chapter 68
Anime Episode 30

Gimlet (徹甲弾(ギムレット) Gimuretto?, lit. Armor-Piercing Bullet) is a composite bullet created through the combination of two Asteroid chips.[3]


Gimlet projectiles are vaguely ellipsoidal in shape, with a short, luminous tail and thin circles surrounding them.


Since composite bullets were discovered by Kōhei Izumi,[4] Gimlet could not have existed until three years prior to Chika Amatori's and Yūma Kuga's enlistment in Border.[5]


Gimlet doubles Asteroid's parameters, which grants it enhanced penetration abilities. It is used to breach sturdy shields or firm armor as well as to inflict damage.[6] Thanks to their extraordinarily high trion levels, Izumi and Masataka Ninomiya can fire Gimlet bullets so powerful that they can crack the armor on the arm of Rabbit,[3] which is capable of deflecting an Ibis blast,[7] and the combined shields of four Idras,[1] which is able to withstand multiple shots from Sniper Triggers,[8] respectively.

Gimlet can be utilized in trion cube form[3][1] or fired through a Gun Trigger.[9] In the latter case, the only known specific is that the firearm is set to shoot exclusively Gimlet;[9] in the former, the user conjures two Asteroid cubes, one from the Main and one from the Sub, and merges them into a single Gimlet cube.[3][1] The process lasts between one minute for inexperienced agents and two seconds for Shooters of Izumi's caliber,[10] during which the user is vulnerable to attack; for this reason, Gimlet cannot be used uniformly in this configuration.[11]


See also: Gimlet Users

The only known users of this composite bullet are Kōhei Izumi[3] and Masataka Ninomiya.[1]


  • Like many other Gunner Triggers, Gimlet may be named after a missile: the SA-16 Gimlet, an early version of the 9K38 Igla. Alternatively, it may be derived from the homonymous rocket.
    • A gimlet is also a drilling tool.
  • Gimlet was described as doubling the "structure" of Asteroid,[6] the same term used by Jun Arashiyama to signify the combination of a Gunner Trigger's power, range and speed parameters.[12]


  1. 1.0 1.1 1.2 1.3 1.4 World Trigger Manga Chapter 127 (p. 3)
  2. World Trigger Manga Chapter 68 (p. 14)
  3. 3.0 3.1 3.2 3.3 3.4 World Trigger Manga Chapter 68 (p. 2)
  4. Daisuke Ashihara: Q145: Is Ninomiya the one who created composite bullets? Is it Izumi? Or an Engineer? A: Izumi tried it out on some kind of impulse and it worked. That is why he is called "genius-like" and "bullet idiot".
    Source: Border Briefing File, Question 145, p. 304
  5. World Trigger MangaBorder Briefing File (p. 270-271)
  6. 6.0 6.1 Daisuke Ashihara: Q142: What abilities does the "Gimlet" that Izumi used in Volume 8 have? A: By doubling the structure of the bullet, penetration power is increased; it is used to breach Shield or firm armor and cause damage.
    Source: Border Briefing File, Question 142, p. 303
  7. World Trigger Manga Chapter 45 (p. 9)
  8. World Trigger Manga Chapter 124 (p. 10-11)
  9. 9.0 9.1 Daisuke Ashihara: Q146: Can Gunners use composite bullets? A: If they set it in the Gun Trigger they can, but that gun then becomes "a gun that can only shoot the composite bullet".
    Source: Border Briefing File, Question 146, p. 304
  10. Daisuke Ashihara: If Osamu tries to shoot a Tomahawk right now, it will take him about a minute’s time to combine them. It takes Izumi about 2 seconds.
    Source: Question Corner 8, Volume 9
  11. World Trigger Manga Chapter 101 (p. 9)
  12. World Trigger Manga Chapter 107 (p. 7)


e - d - vBorder Triggers
Basic Equipment Bail OutRadarTrion Body
Attacker Kogetsu (Kogetsu: Spear) • Raygust (Shield Mode) • ScorpionSōgetsu (Axe)
Gunner AsteroidCobraGimletHornetHoundMeteorSalamanderTomahawkViper
Firearms Assault Rifle • Grenade Launcher • Handgun • Minigun • Shotgun
Sniper EgretIbisLightning
Defense EscudoShield (Fixed Mode/Full Guard)
Trap Switchbox
Optional Bagworm • Bagworm Tag • ChameleonConnectorDummy Beacon • Enhanced Radar • Full ArmsGeistGen'yōGrasshopperIdatenLead Bullet • Makō • Senkū • Silencer • SpiderStarmakerTeleporterThruster • Timer
Prototypes ConnectorDummy BeaconFull ArmsGeistIdaten • Makō • Teleporter • Timer
Black Fūjin • Tsukihiko Amō's Black Trigger • Yūma Kuga's Black Trigger