The Warner carbine was another of the weapons used in small numbers by the Union cavalry during the Civil War. It is a pivoting breechblock action built on a brass frame. These carbines were made in two batches, known as the Greene and Springfield. The first guns were chambered for a proprietary .50 Warner cartridge, which was replaced with .56 Spencer in the later versions (for compatibility with other cavalry arms).
This particular Warner shows some interesting modification to its breechblock, which has been converted to use either rimfire or centerfire ammunition. This was not an uncommon modification for .56 Spencer weapons, as the centerfire type of Spencer ammunition could be reloaded (unlike the rimfire cartridges). With this modification, the firing pin can be switched from rimfire to centerfire position fairly easily.
At Forgotten Weapons I think the most interesting guns out there are the most obscure ones. I try to search out experimental and prototype weapons and show you how they work, in addition to more conventional guns that you may not have heard of before. You’re much more likely to find a video on the Cei Rigotti or Webley-Fosbery here than an AR or Glock. So, do you want to learn about something new today? Then stick around!