FN 5.7×28mm
Handgun cartridge manufactured by FN Herstal / From Wikipedia, the free encyclopedia
The FN 5.7×28mm (designated as the 5.7×28 by the C.I.P.[7] and FN 5.7×28mm NATO[9]) is a small-caliber, high-velocity, smokeless-powder, rebated, non-tapered, bottleneck, centerfire cartridge designed for pistols and personal defense weapons (PDW) uses, manufactured by FN Herstal.[10] It is similar in length to the .22 WMR and .22 Hornet.[10] Unlike many new cartridges, it has no parent case; the complete package was developed from scratch by FN.
FN 5.7×28mm | ||||||||||||||||||||||||
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Type | Pistol, personal defense weapon | |||||||||||||||||||||||
Place of origin | Belgium | |||||||||||||||||||||||
Service history | ||||||||||||||||||||||||
In service | 1990–present | |||||||||||||||||||||||
Used by | 40+ nations; see: | |||||||||||||||||||||||
Wars | ||||||||||||||||||||||||
Production history | ||||||||||||||||||||||||
Designer | ||||||||||||||||||||||||
Designed | ||||||||||||||||||||||||
Manufacturer | FN Herstal | |||||||||||||||||||||||
Produced | ||||||||||||||||||||||||
Variants | See Varieties | |||||||||||||||||||||||
Specifications | ||||||||||||||||||||||||
Case type | Rebated, bottleneck | |||||||||||||||||||||||
Bullet diameter | 5.70 mm (0.224 in) | |||||||||||||||||||||||
Land diameter | 5.53 mm (0.218 in) | |||||||||||||||||||||||
Neck diameter | 6.38 mm (0.251 in) | |||||||||||||||||||||||
Shoulder diameter | 7.95 mm (0.313 in) | |||||||||||||||||||||||
Base diameter | 7.95 mm (0.313 in) | |||||||||||||||||||||||
Rim diameter | 7.80 mm (0.307 in) | |||||||||||||||||||||||
Rim thickness | 1.14 mm (0.045 in) | |||||||||||||||||||||||
Case length | 28.90 mm (1.138 in) | |||||||||||||||||||||||
Overall length | 40.50 mm (1.594 in) | |||||||||||||||||||||||
Case capacity | 0.90 cm3 (13.9 gr H2O) | |||||||||||||||||||||||
Rifling twist | 228.6 mm (9.00 in) 9 in) | |||||||||||||||||||||||
Primer type | Boxer Small Rifle | |||||||||||||||||||||||
Maximum pressure | 345.00 MPa (50,038 psi) | |||||||||||||||||||||||
Ballistic performance | ||||||||||||||||||||||||
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Test barrel length: 263 mm (10.4 in) for bullets 1-3, 406 mm (16.0 in) for bullets 4-5. Source(s): [7][8] |
The 5.7×28mm was developed in conjunction with the FN P90 PDW and later the FN Five-seven pistol in response to NATO requests as a replacement for the 9×19mm Parabellum cartridge.[11][12] In 2002 and 2003, NATO conducted a series of tests with the intention of standardizing a PDW cartridge as a replacement for the 9×19mm Parabellum cartridge.[12] The tests compared the relative merits of the 5.7×28mm cartridge and the 4.6×30mm cartridge, which was created by Heckler & Koch as a competitor to the 5.7×28mm.[12] The NATO group subsequently recommended the 5.7×28mm cartridge, citing superior performance in testing, but the German delegation objected and the standardization process was halted[12] until 2021 when it was officially adopted as a NATO standard Standardization Agreement (STANAG) 4509.[13]
By 2006, FN's 5.7×28mm firearms—the P90 PDW and Five-seven pistol—were in service with military and police forces in over 40 nations throughout the world.[14] In the United States, 5.7×28mm firearms are currently used by numerous law enforcement agencies, including the U.S. Secret Service.[15][16]
In addition to being used in the FN P90 and FN Five-seven firearms, the 5.7×28mm cartridge has subsequently been used in a number of other weapons, such as the AR-57 and FN PS90 carbines.[17][18] Excel Arms has developed four firearms chambered in 5.7×28mm, MasterPiece Arms offers three different firearms in 5.7×28mm.,[19][20] and CMMG offers several of its AR-Style Banshee firearms in 5.7x28.[21] As of December, 2019, Ruger offers its Ruger-57 semi-automatic pistol chambered in this cartridge.[22] January 2021 saw the announcement by Kel-Tec of the P50 handgun, which uses 50 round P90 magazines. Palmetto State Armory introduced its Rock 5.7 pistol in January 2022;[23] it became available for purchase in May 2022.[24] On January 2023, Smith & Wesson introduced the MP 5.7 gas assisted pistol. [25]
The 5.7×28mm cartridge itself is produced in a number of varieties, two of which—the SS195LF and SS197SR—are currently offered by FN to civilian shooters.[17]