A sloop-of-war had zero gun decks.
=== Definition ===According to the Merriam-Webster dictionary, a gun could mean "a piece of ordnance usually with high muzzle velocity and comparatively flat trajectory," " a portable firearm," or "a device that throws a projectile
 The musket was able to penetrate heavy armor, and as a result armor declined, which also made the heavy musket obsolete

