An arm stabilizer includes a stabilizer bar and one or more modular attachments that can be detachably secured to the stabilizer bar. A wrist support attachment can be secured to the distal end of the stabilizer bar. A reducer attachment can be secured to the stabilizer bar between the wrist support attachment and the proximal end of the stabilizer bar. The reducer attachment can be moved along the length of the stabilizer bar at various angular orientations. In some embodiments stabilizer bar is pivotable about a base to allow the stabilizer bar with attachments to be pivoted away from the patient and repositioned at various points in space during use.