You can specially prepare bullets to deliver poisons that are normally used more subtly.
You can spend 1 grit point to load your firearm with 1 dose of inhaled or ingested poison as a move action. This action has no chance of exposing you to the poison (as if you had the poison use class feature). Shooting a firearm loaded with a poison in this manner is a standard action that provokes attacks of opportunity and sprays out the poison in a 15-foot cone. Any creatures caught in the blast take no damage but are exposed to this poison and must each immediately attempt a save against the poison as though the onset time had elapsed.
The text on this page is Open Game Content, and is licensed for public use under the terms of the Open Game License v1.0a.
Sources:
SECTION 15