The manufacturing was contracted out to Henry Deringer and R. Johnson to make rifles for use by the military.
[1] Two manufacturers made this type, Henry Deringer of Philadelphia and R. Johnston of Connecticut.
It had a 33-inch barrel, octagon near the flintlock, turning to round, and using a .54 caliber bullet.
[2] A smoothbore version was also under contract with the government as a trade rifle, for sales to the Native Americans.
Company A of the 2nd Mississippi Infantry carried these rifles, converted to percussion cap.