An early style of musket; a slow-burning wick would be lowered into a hole in the breech to ignite the charge WordNet 3.0 & Open English WordNet

A matchlock or firelock is a historical type of firearm wherein the gunpowder is ignited by a burning piece of flammable cord or twine that is touched to the gunpowder by a mechanism that the musketeer activates by pulling a lever or trigger with his finger. Wikipedia

The gunlock used in such a weapon, having a slow smouldering match, see: slow match. Wiktionary

Gunlock. Wiktionary (translation)