A weapons system, comprising: a weapon, a drive mechanism, an ammunition feeding and/or conveying unit, and an elevation adjustment device, wherein the elevation adjustment device comprises a drive shaft which is pivotable around an elevation axis by means of the drive mechanism for adjusting an elevation angle (α) of the weapons system, a compensation mechanism which produces a compensation momentum that acts on the drive shaft when adjusting the elevation angle (α), wherein the compensation momentum counteracts an unbalance momentum of the weapons system that acts on the drive shaft, wherein the compensation mechanism comprises a movable loose bearing, a sensor unit which captures the elevation angle (α) and a filling level of the ammunition feeding and/or conveying unit, and an actuator by means of which the loose bearing is movable for adjusting a pretension of the compensation mechanism depending on sensor signals of the sensor unit in such a way that the compensation momentum adapts to a change in the unbalance momentum when adjusting the elevation angle (α) and when the filling level of the ammunition feeding and/or conveying unit changes, wherein the pretension of the compensation mechanism is adjustable by means of the actuator in such a way that, when adjusting the elevation angle (α), a resulting rest momentum, which results from a difference between the unbalance momentum and the compensation momentum, is constant, and wherein for adjusting the elevation angle (α), the drive mechanism applies the resulting rest momentum to the drive shaft in order to pivot the drive shaft around the elevation axis. a weapon, a drive mechanism, an ammunition feeding and/or conveying unit, and an elevation adjustment device, wherein the elevation adjustment device comprises a drive shaft which is pivotable around an elevation axis by means of the drive mechanism for adjusting an elevation angle (α) of the weapons system, a compensation mechanism which produces a compensation momentum that acts on the drive shaft when adjusting the elevation angle (α), wherein the compensation momentum counteracts an unbalance momentum of the weapons system that acts on the drive shaft, wherein the compensation mechanism comprises a movable loose bearing, a sensor unit which captures the elevation angle (α) and a filling level of the ammunition feeding and/or conveying unit, and an actuator by means of which the loose bearing is movable for adjusting a pretension of the compensation mechanism depending on sensor signals of the sensor unit in such a way that the compensation momentum adapts to a change in the unbalance momentum when adjusting the elevation angle (α) and when the filling level of the ammunition feeding and/or conveying unit changes, wherein the pretension of the compensation mechanism is adjustable by means of the actuator in such a way that, when adjusting the elevation angle (α), a resulting rest momentum, which results from a difference between the unbalance momentum and the compensation momentum, is constant, and wherein for adjusting the elevation angle (α), the drive mechanism applies the resulting rest momentum to the drive shaft in order to pivot the drive shaft around the elevation axis.