The smallest commercially produced centerfire pistol cartridge ever made. Fires a 3-grain bullet at roughly 700 fps, generating approximately 3 ft-lbs of muzzle energy — less than most air rifles. Designed for the Kolibri vest-pocket pistol, one of the smallest semi-automatic pistols ever manufactured.
Type: Pistol
Introduced: 1914, Austria
Parent case: None
Standardization: None
Bullet diameter: 0.107" (2.7 mm)
Case length: 0.37" (9.4 mm)
Overall length: 0.43" (10.9 mm)
Max pressure: 25,000 PSI
Rim type: Rimless
Primer: Centerfire
Typical twist rate: 1:10
Muzzle velocity: 650–720 fps
Muzzle energy: 3–4 ft-lbs
Effective range: 5 yd
Common bullet weights: 3 gr
Primary use: Self Defense
Production status: Discontinued
Also known as: 2.7mm Auto
History: Designed by Austrian watchmaker Franz Pfannl around 1910–1914, the Kolibri (German for 'hummingbird') pistol and cartridge represent the extreme miniaturization of early semi-automatic pistol design. The pistol measured just 2.7 inches long. Production was very limited and ended after WWI. Complete Kolibri pistols with original ammunition are extremely rare; a single round can fetch significant…
Notable firearms: Kolibri 2.7mm Semi-Automatic Pistol
Similar cartridges: 3mm Kolibri, 4.25mm Liliput