In one example, a firearm sound suppressor includes a housing including a front end and a rear end. The rear end includes a flange that partially encloses the rear end and defines a rear aperture. The firearm sound suppressor also includes a back end member disposed substantially within the rear end of the housing and including a rear surface disposed in abutment with an inner surface of the flange to prevent the back end member from passing through the rear aperture. Other embodiments are also contemplated.