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Colt AR Patent Print

This patent image was created by using U.S. Patent #3,236,155 AR-15 Rifle (AR15 Semi-Automatic Weapon) which was patented in 1966 by its inventor Foster E. Sturtevant. This invention, titled firearm having an auxiliary bolt closure mechanism, was assigned to Colt’s Manufacturing Co Inc. The patent covers a variety of improvements in the bolt closure mechanism to improve its performance in all use conditions.

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