firelock

noun2

1. •
   (historical) A form of gunlock, in which the priming is ignited by a spark.
2. •
   (historical) A firearm using such a gunlock.

   • He looked round for his gun, but in place of the clean well-oiled fowing-piece, he found an old firelock lying by him, the barrel encrusted with rust, the lock falling off, and the stock worm-eaten. — 1819