This 3D model recreates the 15 mm Lefaucheux pinfire cartridge, one of the early self‑contained metallic rounds developed by French gunmaker Casimir Lefaucheux in the mid‑19th century. The cartridge features an integrated primer and propellant inside a single case, with a small side pin that strikes the capsule when the hammer hits, making it a key step toward modern ammunition. The 15 mm variant was used in revolvers and other pinfire firearms, offering improved reliability and weather resistance compared with older percussion systems.

The model is scaled to match historical 15 mm Lefaucheux dimensions, giving an authentic look for display, education, or collection reference. The pin itself is not printed as one piece; instead, cut a 10 mm segment from 1.75 mm filament and glue it into the pin hole after printing to preserve detail and strength. The design is optimized for FDM printing with PLA, PETG or ASA, and it prints cleanly without supports or brim.

If you like the model, please download it, share your printed copies, rate it, and give it a boost so other firearms and history enthusiasts can find it more easily. If you need a different size (scaled up/down) or a modified version to fit a specific revolver or diorama, leave a comment with your requirements. You can also suggest other historical cartridges or firearm parts you would like to see modeled next.

Recommended settings:

• Material: PLA / PETG / ASA
• Supports: no
• Brim: no