The Ruger Model 44 is a semi-automatic rifle chambered in .44 Remington Magnum designed and manufactured by American firearm company Sturm, Ruger & Co. It uses a 4-round tubular magazine and was produced from 1961 to 1985.

The .44 Remington Magnum, also known as .44 Magnum or 10.9x33mmR, is a rimmed, large-bore cartridge originally designed for revolvers and quickly adopted for carbines and rifles. Despite the ".44" designation, guns chambered for the .44 Magnum round, its parent case, the .44 Special, and its parent case, the .44 Russian all use 0.429 in (10.9 mm) diameter bullets. The .44 Magnum is based on the .44 Special case but lengthened and loaded to higher pressures for greater velocity and energy.