The M1951 was the first pistol made by Berreta that has a locked breech system. All others had been blowback operated. The gun was made when Beretta was a competing for the contract of the Egyptian Army’s sidearm. Their competition was the Soviet made Torakev. Despite Soviet pressure, Egypt chose the M1951 because of its resistance to many problems caused by the desert.
9x17mm is the round fired by the M1951. The pistol has a locked breech design, and has an 8 round removable magazine.