The stink gun is a highly experimental weapon being developed by the Colonial Marines.
In overall shape it resembles a flamethrower but instead of sprying fire it spreads out two types of pheromones, the first firing mode shoots our pheremones that cover the target and give it the scent to make it appear as a incredebly dangerous threat to all Xenomorphs within a 5 mile radius causing them to go beserk over killing the afflicted target/targets.The second firing mode produces pheremones that cause the target to have the scent of a Xenomorph causing all Xenomorphs to become passive towards the target until the scent is washed off with any liquid.