57×28mm

57x28mm is a type of ammunition. It is a rimless, straight-cased cartridge that is not necked. The cartridge is used in a variety of firearms, most notably in submachine guns and some pistol-caliber carbines. The 57x28mm cartridge has a relatively long case, which allows for a higher propellant charge and thus a higher muzzle velocity compared to many other pistol cartridges. This higher velocity contributes to better penetration and range. It is also known for its relatively low recoil, making it easier to control during rapid fire. The cartridge was developed in the late 20th century and has seen use in military and law enforcement applications. Its design is intended to offer a balance of performance characteristics suitable for close-quarters combat and personal defense. The projectile itself is typically a full metal jacket or similar construction. Various manufacturers produce ammunition in this caliber.