Splatling
From Inkipedia, the Splatoon wiki
Splatlings are Gatling-style weapons in Splatoon. These weapons function like Chargers, where they require time to charge up to increase effectiveness. Though, rather than extend damage and range, a Splatling's charge instead increases the weapon's fire duration.
The first weapon in this class, the Heavy Splatling, was released in the August Update on August 6th.