Kerotans must be hit with a bullet, tranq dart, explosive, knife/fork, or punch/kick to be triggered. Stun grenades and white phosphorous grenades can activate the kerotan if the grenade, not the explosion, hits the kerotan. Most kerotans can be hit with weapons like the M1911A1 and the Mk22, but a few kerotans can only be reliably hit with the SVD, RPG-7, or an automatic weapon.