The MR11 Gatekeeper is the Terran Republic's second unique AV weapon. Used as a secondary weapon on the Prowler, the Gatekeeper is a long range rocket launcher firing fast travelling projectiles to apply damage to enemy armor at medium to long range. Having a very high muzzle velocity of 450m/s allows the Gatekeeper to excel at hitting fast moving enemy vehicles at close to medium range as well as enemy armor at long range. It can even reliably hit aircraft when in the hands of an experienced gunner.