.25 NAA

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

Key specs

Type: Pistol
Origin: United States
Designer: J.B. Wood
Introduced: 1999
Case type: rimless, bottleneck
Bullet diameter: 6.38 mm
Case length: 18.92 mm
Overall length: 24.38 mm
Typical bullet: 35 gr
Typical velocity: 366 m/s
Typical energy: 164 J
Parent case: .32 ACP

Sources

Wikipedia: .25 NAA, Wikipedia