5.7x40mm AVA
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| 5.7x40mm EC | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | ||||||||||||
| Type | Rifle | |||||||||||
| Place of origin | Entente Cordiale | |||||||||||
| Service history | ||||||||||||
| In service | 1978–present | |||||||||||
| Used by | Sieuxerr Sylva New Tyran EC | |||||||||||
| Wars | Various | |||||||||||
| Production history | ||||||||||||
| Designer | Saint-Étienne Arms Manufacturer | |||||||||||
| Designed | 1977 | |||||||||||
| Manufacturer | MAS Manurhin Various other plants | |||||||||||
| Specifications | ||||||||||||
| Case type | Rimless | |||||||||||
| Bullet diameter | 5.7 millimetres (0.22 in) | |||||||||||
| Neck diameter | 6.5 millimetres (0.26 in) | |||||||||||
| Shoulder diameter | 8.3 millimetres (0.33 in) | |||||||||||
| Base diameter | 9 millimetres (0.35 in) | |||||||||||
| Rim diameter | 9 millimetres (0.35 in) | |||||||||||
| Rim thickness | 1.5 millimetres (0.059 in) | |||||||||||
| Case length | 40 millimetres (1.6 in) | |||||||||||
| Overall length | 56.4 millimetres (2.22 in) | |||||||||||
| Rifling twist | 1:12 | |||||||||||
| Primer type | Small rifle | |||||||||||
| Ballistic performance | ||||||||||||
| ||||||||||||
| Test barrel length: 500 millimetres (20 in) Source(s): Arsenal Munitions Test Range | ||||||||||||
The 5.7x40mm EC is a rimless, bottlenecked, center-fired intermediate cartridge family. Designed in the mid-1970s, the 5.7mm EC and 7x51mm EC cartridges and their weapons would become standardized across the Entente and Entente-aligned nations by the 1980s.