unchambered
Barrel currently empty
Unchambered describes a firearm with no round loaded in the chamber, the part of the barrel where a cartridge sits ready to fire.
A gun may have a full magazine but remain unchambered as a safety measure: He carries unchambered—one less thing to worry about.
The term also applies to removing a round: She unchambered the bullet before cleaning the weapon.
unloaded
Emptied of cargo
ammunition · round · bullet · magazine · cylinder · breech · bolt-action · muzzle · discharge · loading
open
Not closed
unpartitioned · hallway · corridor · loft · open-plan · airy · spacious · connected · flowing · barrier-free
chamber, chambers, chambered, antechamber, chambermaid, chamberlain, bedchamber, chambering