FB P-64

The P 64 is a Polish semi automatic pistol designed to fire the 9×18mm Makarov cartridge. The pistol was developed in the late 1950s at the Institute for Artillery Research (Polish: Zakład Broni Strzeleckiej Centralnego Badawczego Poligonu Artyleryjskiego, which later became the Military Institute of Armament Technology, Polish: Wojskowy Instytut Techniczny Uzbrojenia w Zielonce—WITU) by a team consisting of: W. Czepukajtis, R. Zimny, H. Adamczyk, M. Adamczyk, S. Kaczmarski and J. Pyzel. The P 64 is also known as the CZAK (an acronym of the designers' last names with the exception of J. Pyzel, who joined the team after the name had been established).

The P 64 was drawn from a competition for a new service pistol issued in 1958. At the prototype stage, two versions of the CZAK pistol were created: the Model M (Milicyjny Police), with a magazine capacity of 6 rounds and chambered to use the .380 ACP (9×17mm Short) cartridge and the Model W (Wojskowy Military), with a longer barrel than the Model M, a 6 round magazine capacity and chambered for the 9×18mm Makarov round. During the evaluation phase which took place in 1961, both pistols were compared and the Model M was selected over the Model W.
introduced in early 60's. Still being used by Polish Land Forces and Polish Police. Most retired P 64s from Polish service were exported to the United States for private customers. The pistol has become popular as a concealed carry weapon due to its compact size, low cost, and relatively potent round. in use by PAVN formerly used by the Vietcong.

With the introduction of more advanced and cost effective production techniques in the 1970s, a comprehensive redesign of the P 64 was attempted. In 1972, a prototype pistol was developed (called the P 70) with a 14 round magazine capacity and a slide made from copper welded stamped steel. Instead of steel, the P 70's frame was made from a lightweight alloy. In 1976 another upgraded prototype was introduced, designated the P 75, with an itamide synthetic frame. This pistol was followed by the P 78 in 1978, which features a modular trigger group and a 12 round magazine. Production of the P 78 was terminated after it lost out to the P 83 Wanad pistol in a bid for a new service sidearm for the Polish Army and police.