The Springfield Model 1822 was a .69 caliber flintlock musket manufactured by the United States in the early 19th century.

The forward part of the trigger guard was provided with an enlargement which was drilled to receive the sling swivel rivet.

[2] In addition to the Springfield and Harpers Ferry armories, the Model 1822 was produced by numerous other independent contractors.

However, during the Mexico City campaign, General Winfield Scott insisted on his army being equipped with flintlock muskets because flints were easy to make or procure, important in a hostile country where supply lines were vulnerable.

During the latter, .69 caliber muskets (mostly percussion, but some flintlocks as well) were common in the early part of the war (either in their original form or converted to rifling).