
The Wildey is a gas-operated, double-action/single-action pistol designed by Wildey J. Moore. It was designed to fire several high-pressure proprietary cartridges including the .45 Winchester Magnum and the .475 Wildey Magnum. They are currently being produced by USA Firearms Corp.-Wildey Guns of Winsted, Connecticut.

The .44 Auto Mag pistol (AMP) is a large caliber semi-automatic pistol. It was designed between 1966 and 1971 by the Auto Mag Corporation to make a semi-automatic pistol chambered in .44 AMP.
The AMT Automag III is a single action semi-automatic handgun, designed by Harry Sanford, creator of the first Automag. The Automag III does not actually fire a magnum cartridge, but is chambered for the .30 Carbine cartridge originally designed for the World War II era M1 carbine. It was also originally chambered for the 9mm Winchester Magnum cartridge. Only the original AMT production pistols were made in 9mm Winchester Magnum; later Galena production was only in .30 Carbine. It is made of stainless steel and has an 8-round magazine.

The AMT Automag V is a large single action semi-automatic pistol made by Arcadia Machine and Tool (AMT). The weapon was created by Harry Sanford, who also invented the original .44 AutoMag pistol. One of the extremely small number of handguns that fire a .50 caliber cartridge, it is also one of the few semi automatic guns that fires the .50 Action Express cartridge, it is said to be "the most ergonomic and lightweight of all of those autoloaders". Its built-in compensator ports in the barrel assist in keeping muzzle rise to tolerable levels. The recoil, however, is still surprisingly brisk even for the most experienced shooter. The Automag V uses a 5-round magazine and is, like all AMT pistols, made primarily of cast stainless steel.

The Desert Eagle or Deagle is a semi-automatic pistol known for chambering the .50 Action Express, the largest centerfire cartridge of any magazine-fed, self-loading pistol. Magnum Research Inc. (MRI) designed and developed the Desert Eagle. The design was refined and the pistols were manufactured by Israel Military Industries (IMI) until 1995, when MRI shifted the manufacturing contract to Saco Defense in Saco, Maine. In 1998, MRI moved manufacturing back to IMI, which later commercialized its small arms branch under the name Israel Weapon Industries. Since December 2009, the Desert Eagle Pistol has been produced in the United States at MRI's Pillager, Minnesota, facility. Kahr Arms acquired Magnum Research in 2010.

The Kel-Tec PMR-30 is a full-size semi-automatic pistol manufactured by Kel-Tec of the United States. It was made available in 2011. It has a single action trigger pull of 3.5 to 5 lbf and a manual safety device. It is chambered in .22 Winchester Magnum Rimfire and the special, factory-shipped, double-stack magazine has a capacity of 30 rounds. The PMR-30 uses fixed fiber optic open sights. The slide is also pre-drilled to allow for the mounting of various red-dot sights with the purchase of appropriate mounting plates from the manufacturer. It has a European-style magazine release.

The Grizzly Win Mag pistols were conceived, invented, designed, engineered and developed in the 1980s by the sole inventor, Perry Arnett, who licensed his patent for an interchangeable caliber semi-automatic pistol to L.A.R. Manufacturing Inc. Perry Arnett's designs were initially flawed and were improved upon by Heinz Augat. The L.A.R. Grizzly was the most powerful semi-automatic pistol ever commercially produced after the Desert Eagle..