A golf club head comprising: a crown, a sole, a toe region, a heel region, a rear portion, and a front portion comprising a strike face; wherein the crown, sole, toe-region, heel region, front portion, and rear portion form a hollow interior; wherein the strike face further comprises a strike face geometric center; wherein a loft plane is defined tangent to the strike face geometric center defining a coordinate system having an x-axis, y-axis, and z-axis through a coordinate system origin at the strike face geometric center; wherein the x-axis extends through the strike face geometric center from the toe-region to the heel-region, the y-axis extends through the strike face geometric center in a direction from the crown to the sole, and the z-axis extends through the strike face geometric center in a direction from the front portion to the rear portion; wherein the x-axis, y-axis, and z-axis are perpendicular to one another; wherein the golf club head further comprises a depth measured from the loft plane to the rear most point of the rear portion parallel to the z-axis, and a length measured across the maximum extent between the toe-region to the heel-region parallel to the x-axis; wherein the rear portion further comprises a single slot; wherein the single slot comprises: a slot interior surface, a slot bottom surface, a slot top surface, and two slot sidewalls; wherein the slot interior surface, slot bottom surface, slot top surface, and two slot sidewalls cooperate to form a slot channel open to the rear and sole of the golf club head; wherein the slot interior surface, slot bottom surface, slot top surface, and two slot sidewalls further form a slot structure exposed to the hollow interior; wherein the slot interior surface further comprises a plurality of apertures (252,254,256); wherein each of the plurality of apertures (252,254,256) comprise weight assembly attachment points; wherein the golf club head further comprises a moveable weight assembly; wherein the weight assembly comprises a single weight member and a single fastener; wherein the weight assembly is detachably affixed to one of the plurality of apertures (252,254,256), the golf club head being characterized in that: the slot further comprises a slot height measured between the slot bottom surface and the slot top surface; wherein the slot comprises a slot length measured between the two slot sidewalls; and wherein the slot height is varied along the slot length. a crown, a sole, a toe region, a heel region, a rear portion, and a front portion comprising a strike face; wherein the crown, sole, toe-region, heel region, front portion, and rear portion form a hollow interior; wherein the strike face further comprises a strike face geometric center; wherein a loft plane is defined tangent to the strike face geometric center defining a coordinate system having an x-axis, y-axis, and z-axis through a coordinate system origin at the strike face geometric center; wherein the x-axis extends through the strike face geometric center from the toe-region to the heel-region, the y-axis extends through the strike face geometric center in a direction from the crown to the sole, and the z-axis extends through the strike face geometric center in a direction from the front portion to the rear portion; wherein the x-axis, y-axis, and z-axis are perpendicular to one another; wherein the golf club head further comprises a depth measured from the loft plane to the rear most point of the rear portion parallel to the z-axis, and a length measured across the maximum extent between the toe-region to the heel-region parallel to the x-axis; wherein the rear portion further comprises a single slot; wherein the single slot comprises: a slot interior surface, a slot bottom surface, a slot top surface, and two slot sidewalls; wherein the slot interior surface, slot bottom surface, slot top surface, and two slot sidewalls cooperate to form a slot channel open to the rear and sole of the golf club head; a slot interior surface, a slot bottom surface, a slot top surface, and two slot sidewalls; wherein the slot interior surface, slot bottom surface, slot top surface, and two slot sidewalls cooperate to form a slot channel open to the rear and sole of the golf club head; wherein the slot interior surface, slot bottom surface, slot top surface, and two slot sidewalls further form a slot structure exposed to the hollow interior; wherein the slot interior surface further comprises a plurality of apertures (252,254,256); wherein each of the plurality of apertures (252,254,256) comprise weight assembly attachment points; wherein the golf club head further comprises a moveable weight assembly; wherein the weight assembly comprises a single weight member and a single fastener; wherein the weight assembly is detachably affixed to one of the plurality of apertures (252,254,256), the golf club head being characterized in that: the slot further comprises a slot height measured between the slot bottom surface and the slot top surface; wherein the slot comprises a slot length measured between the two slot sidewalls; and wherein the slot height is varied along the slot length. the slot further comprises a slot height measured between the slot bottom surface and the slot top surface; wherein the slot comprises a slot length measured between the two slot sidewalls; and wherein the slot height is varied along the slot length.