5.6×57mm

Photo coming soon: side view on a transparent background, with author and license.

Key specs

Type: Rifle
Origin: Germany
Designer: RWS
Introduced: 1964
Case type: rimless, bottleneck
Bullet diameter: 5.70 mm
Case length: 56.70 mm
Overall length: 69.00 mm
Typical bullet: 74 gr
Typical velocity: 1,040 m/s
Typical energy: 2,596 J
Parent case: 7×57mm Mauser

Sources

Wikipedia: 5.6×57mm, Wikipedia