12 mm Lefaucheux

The topic of this article may not meet Wikipedia's notability guidelines for products and services. Please help to demonstrate the notability of the topic by citing reliable secondary sources that are independent of the topic and provide significant coverage of it beyond a mere trivial mention. If notability cannot be shown, the article is likely to be merged, redirected, or deleted. Find sources: "12 mm Lefaucheux" – news · newspapers · books · scholar · JSTOR (February 2023) (Learn how and when to remove this message)

12 mm Lefaucheux
Type	Revolver
Service history
In service	1858–1892
Used by	French Navy and French Army
Production history
Designed	1858
Specifications
Case type	Rimmed, straight
Bullet diameter	11.3 mm (0.44 in)
Neck diameter	11.8 mm (0.46 in)
Base diameter	11.9 mm (0.47 in)
Rim diameter	12.6 mm (0.50 in)
Rim thickness	0.94 mm
Case length	19.9 mm (0.78 in)
Overall length	30.8 mm (1.21 in)

The 12mm Lefaucheux is a metallic center-fire cartridge. It was originally created as a rimless pinfire cartridge using black powder employed by the French navy on the Lefaucheux M1858 revolver. Later it was adapted to a center-fire cartridge by the French Army in 1873 for use on the MAS 1873 revolver.