Kidō gun

A kidō gun was a firearm weapon that was first used by the inventor Ran'Tao, formerly of the Gotei 13, but later was further developed by Anthony Iscariot from Britannia. The Britannian kidō gun compressed the reiatsu of the individual using it into dense spherical energy, which was then propelled at high speeds to injure a target. Numerous varieties of Anthony's kidō gun were developed, including an assault rifle and machine gun, and they were commonly found at Britannian division headquarters.

Anthony's kidō gun's enormous power was first realized when it saw great use in the Twelfth Division Rebellion, since it amplified the power of many weaker individuals who used it. The force multiplication that the weapon gave began a major crisis within Britannia that forced the entire military arm of Britannia, the Royal Guard, to step in and quell the rebellion through sheer experience.