noun / verb
holster
HOHL-ster/ˈhəʊlstər/
A fitted holder for a handgun or tool, or to put one into it.
The handgun sits securely in the fitted leather holster on his belt.

Etymology
Old English heolster meant concealment or a hiding place, providing a possible connection to a handgun case. This ancestry is probable rather than certain; related Norse or Dutch words could instead be the source.
In context
we can see his own 44 sitting loosely in the shoulder-strapped holster