The M-1 Bipower is a unique weapon, combining a 9-shot, .55 caliber revolver with a 23-shot, 22mm auto. The revolver can use any of the special-purpose loads developed for the CA-MAP, while the 22mm auto can deliver fast, accurate firepower. The version A inherited many of the bugs from the prototype, and was soon superseded by version C2.

The M-1 Bipower is a unique weapon, combining a 9-shot, .55 caliber revolver with a 23-shot, 22mm auto. The revolver can use any of the special-purpose loads developed for the CA-MAP, while the 22mm auto can deliver fast, accurate firepower. The version A inherited many of the bugs from the prototype, and was soon superseded by version C2.