This 3D model faithfully reproduces the diminutive 5 mm Lefaucheux pinfire cartridge, a small‑caliber metallic round that emerged from Casimir Lefaucheux’s groundbreaking self‑contained cartridge system in the mid‑19th century. Like other Lefaucheux pinfire designs, this cartridge integrates bullet, propellant, and internal primer into a single brass case, featuring a small radial pin that ignites the powder charge upon impact with the hammer—eliminating the need for a separate percussion cap. The 5 mm variant was commonly used in ultra‑compact pocket revolvers and miniature firearms, making it a fascinating subject for collectors and enthusiasts of early breech‑loading weapons.

The model is scaled to precisely match the historical dimensions of the 5 mm Lefaucheux cartridge, offering an authentic visual representation ideal for display, educational purposes, or as a reference for model gunsmiths. The pin itself is not printed in one continuous piece; instead, after printing, cut a 5 mm segment from 1.75 mm filament and carefully glue it into the pin hole to maintain structural integrity while preserving the distinctive pinfire detail. The design is optimized for FDM printing using PLA, PETG, or ASA, delivering clean, high‑quality prints without the need for supports or brims.

If you enjoy this model, we encourage you to download it, share your printed versions, leave a rating, and help us spread the word so more history and firearms enthusiasts can discover it. If you require a different scale—whether larger or smaller—or if you’d like a customized version tailored to a specific revolver or diorama, simply leave a comment with your desired dimensions or specific requirements. You’re also welcome to suggest other historical cartridges or firearm‑related components you’d like to see modeled next.

Recommended print settings:

• Material: PLA / PETG / ASA

• Supports: none

• Brim: none