The rifle in the foreground is a Burnside carbine invented by Ambrose Burnside. This breech-loading carbine saw widespread use during the American Civil War.
Ambrose Everett Burnside
This fellow resembles General Ambrose Burnside. Burnside had an impressive resume including railroad executive, inventor, governor of Rhode Island, and U.S. Senator. His distinctive style of facial hair became known as sideburns.