The 1875 Lee Vertical Action was an experimental rifle designed by James Paris Lee (of Lee Enfield and Lee Navy fame) as an idea to increase the rate of fire from single-shot Army rifles. He touted an impressive 30 rounds in 45 seconds with the rifle, thanks to several design elements that combined to make a very fast manual of arms. In total only 143 of these guns were made at Springfield Armory, and this example is the only known carbine variant.