Abstract: The present disclosure generally relates to compensators for use with firearms, for example, to inhibit muzzle climb and/or recoil of the firearms when the firearms are discharged, etc. In one example embodiment, a compensator generally includes a body defining a channel having a keyed shape configured to receive a rail of a firearm to thereby inhibit movement of the body relative to the firearm, and means configured to engage the body and the rail of the firearm to thereby secure the compensator to the firearm.