The Lorenz rifle was an Austrian rifle used in the mid 19th century. It was used in several European wars, and also featured prominently in the U.S. Civil War. This was the first rifle used by both sides of the conflict, until replaced by the Springfield.
The Model 1861 and subsequent Model 1863 (or M1861 and M1863 respectively) were the last percussion arms designed and issued to the United States Army. The M1861 and it’s simple variation in the form of the M1863 was a logical step from the M1855 series arms.
For some very interesting reads on your kindle, check out the Civil War Bookshelf, at Gutenberg: