The 9x21mm (AKA: 9mm IMI, 9x21mm IMI, 9×21 Italian) is a Center Fire cartridge with a Bullet Diameter of 0.355 in” (9.02mm) that is primarily used in Pistols. The 9x21mm originated in Israel in (UNKNOWN DATE). The 9x21mm also has a case length of 0.833 in” (21.16mm) and an overall length of 1.171 in” (29.74mm).
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