Built on the Supermag (357 Max) frame, but chambered for a slightly longer version of the 44 mag (about 1/8", if I recall). Designed for silhouette shooters and handgun hunters. They are accurate, and soak up recoil quite well due to the weight of the gun (and a unique vented brake system). In good shape, $600 or so, there isn't much demand, and getting parts or repairs is difficult, at best. FWIW - dan