The thread has some how drifted to rifles? The OP was handguns Semi or revolver. This is an LAR Grizzly .45 Winchester Magnum. These guns were made on a limited production for Bear defense. They were made in .50 AE and .44 Mag. This particular handgun has .357 Mag. Conversion.
This "Grizz" put down a Black Bear with a real bad attitude in the Sierra Madre Mtns with one round. In the old days Black Bear tags were free to residents.