The disclosure is premised on the realization that despite the apparent convenience, safety and effectiveness possible by use of a less-lethal weapon incorporated into the foregrip of a two-handed weapon, no major police department, government agency, or military unit deploys such a system. This deficiency can be remedied by the disclosed device, which comprises a less-lethal weapon system that employs industry-standard components, and is effective and easy to use. The disclosed invention mounts a standard-size incapacitant canister in the handgrip portion of a foregrip. The foregrip is secured to the firearm by a standard rail system, and uses standard trigger and safety configurations. The canister magazine allows for efficient loading and reloading of the incapacitant, and the canister mounting angle allows for effective use. Further, some embodiments of the invention may include an accessory mounting area in which a tactical flashlight or laser may be mounted.