Tsunami Arms "Ragnarok" Close Assault Weapon

Tsunami Arms "Ragnarok" Close Assault Weapon is shotgun uses special Electrothermal Ammo Enhancement, combined with a dual reciprocating-barrel action and hydroshock recoil compensation (see Constitution Arms Hurricane). The batteries are set on the stock; up to five can be mounted. This has been designed for the 2021 SDF arms trials, but the Tokyo C-SWAT already has a couple.

Source

 * Pacific Rim, pg.18
 * Blackhand's Street Weapons, pg.22