1) Flintlock 2) Muzzle loader 1) Flintlock 
• (n.) An old form of gunlock, as the flintlock, which ignites the priming by a spark; perhaps originally, a matchlock. Hence, a gun having such a lock.
See flintlock and wheel-lock.
Fire'lock` noun An old form of gunlock, as the flintlock, which ignites the priming by a spark; perhaps originally, a matchlock. Hence, a gun having such a lock. 
noun a muzzle loader that had a flintlock type of gunlock
a gun having a lock in which the priming is ignited by sparks struck from flint and steel, as the flintlock musket.