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John Douglas Pedersen
John Douglas Pedersen was a prolific arms designer who worked for Remington Arms, and later for the United States Government.

Born in Denmark, he lived for a time in Wyoming, where most of his patents list his home. He is best known for the Pedersen device that converted a standard military Springfield 1903 rifle to a semi-automatic, intermediate-caliber firearm. He designed several guns for Remington, including the novel Model 51 pistol and Models 10, 12, and 14. He collaborated with John Browning to design the model 17 shotgun. The Model 17 was a trim, 20ga shotgun that was later redesigned and made in three highly successful forms: the Remington model 31, Browning BPS, and the Ithaca 37.

Pedersen designed the two second best U.S. military firearms of the 20th century. His .45 caliber automatic pistol, based on the same design as the Model 51, was accepted by the Navy Board for production, but the First World War intervened and Remington tooled to produce the M1911 instead. He also designed the competing design to the M1 Garand rifle. His design utilized a toggle-lock and patented waxed cartridges. The Garand was selected instead. His "Pedersen rifle" was also trialed by the British in between World War I and World War II, but it was not adopted.

Pedersen was issued 69 patents listing his home as Wyoming, and others listing Colorado and New York State.