The term "Grizzly gun" can refer to two different firearms: the LAR Grizzly Win Mag pistol and the Bond Arms Grizzly derringer.
The LAR Grizzly Win Mag pistol is a modified Colt M1911 style pistol with oversize components designed to handle larger, more powerful cartridges than could be used in the standard size 1911 pistol. It was developed to fire the powerful .45 Winchester Magnum round, and at various times, conversion kits were sold allowing the pistol to fire other rounds, including .45 ACP, 10 mm Auto, and .357 Magnum. The Grizzly is an oversize of the Colt M1911 design, and most parts are interchangeable with those of the standard size pistols of other manufacturers.
The Bond Arms Grizzly derringer, on the other hand, is a compact firearm with a 3" barrel chambered for 45LC/.410. It has a rough-looking appearance and is designed for close-range self-defense situations.
Therefore, a Grizzly gun can refer to either the LAR Grizzly Win Mag pistol or the Bond Arms Grizzly derringer, depending on the context.
