Golf club head with adjustable center of gravity

A driver-type golf club head comprising:

• a metal body comprising a sole, a hosel, a heel side, a toe side, a face, and a rear side opposite the face;
• a non-metal crown;
• a first channel;
• at least one slidable receptacle sized to fit within the first channel;
• and
• a slidable weight,
• wherein the sole comprises a recessed area,
• wherein the first channel is disposed within the recessed area and comprises a first floor and first and second rails extending from the first floor,
• wherein the at least one slidable receptacle comprises a first upper portion having an elongated slot, a first base portion, and a first bolt,
• wherein the elongated slot comprises a second floor and third and fourth rails extending from the second floor,
• wherein the slidable weight comprises a second upper portion, a second base portion, and a second bolt,
• wherein the first upper portion and the first base portion reversibly grip the first and second rails when the first bolt is tightened,
• wherein the second upper portion and the second base portion reversibly grip the third and fourth rails when the second bolt is tightened,
• wherein the first upper portion is composed of a first material having a first density, and
• wherein the first base portion is composed of a second material having a second density that is less than the first density.