| 41 Short Rimfire "U" - UMC H/S |
 |
| The 41 Short Rimfire was Introduced in 1863 for the National Arms Co. Derringer. The U.M.C. Co. or Union Metallic Cartridge Company made these specimens around 1885. They used a "U" with lines on the top of the letter, before they merged with the Remington Company. The Remington Company used a "U" without the lines on top of the letter. |