The Deerfield Carbine or Model 99/44 is a .44 Magnum

semi-automatic rifle A semi-automatic rifle is an autoloading rifle that fires a single cartridge with each pull of the trigger, and uses part of the fired cartridge's energy to eject the case and load another cartridge into the chamber. For comparison, a bolt-a ...

produced by Sturm, Ruger & Co. It uses a rotating-bolt short-stroke gas-piston. It was introduced in 2000 and discontinued in 2006. The Deerfield Carbine replaced the earlier Ruger Model 44 Deerstalker rifle first produced in 1961 and dropped from the Ruger lineup in 1985 due to high production cost. The Deerfield is a brand new design and has little in common with the Model 44. While the Model 44 featured a solid-topped receiver, the modern Deerfield Carbine has an open-top design more resembling the

M1 Carbine The M1 carbine (formally the United States Carbine, Caliber .30, M1) is a lightweight semi-automatic carbine that was a standard firearm for the U.S. military during World War II, the Korean War and the Vietnam War. The M1 carbine was produced ...

, which is stronger and easier to make. The Deerfield also uses a rotary magazine similar to that used on Ruger's

.22 LR The .22 Long Rifle or simply .22 LR or 22 (metric designation: 5.6×15mmR) is a long-established variety of .22 caliber rimfire ammunition originating from the United States. It is used in a wide range of rifles, pistols, revolvers, smooth ...

10/22 rifle, whereas the Model 44 was fed via a fixed 4-shot

tubular magazine A magazine is an ammunition storage and feeding device for a repeating firearm, either integral within the gun (internal/fixed magazine) or externally attached (detachable magazine). The magazine functions by holding several cartridges with ...

References

{{Ruger .44 Magnum firearms Semi-automatic rifles of the United States Short stroke piston firearms Deerfieldug Rotary magazine firearms Carbines