The Caldwell universal brass catcher. Is the perfect tool for any re-loader or conscious shooter. This expended brass catcher conveniently fits onto bolt-action and semi-automatic rifles to allow you to focus on shooting, rather than worrying about where your brass is landing. When the bag is full (100 rounds of 223) simply use the zipper on the bottom of the bag to empty the casings into your desired container and keep shooting. Swing-open design allows for convenient chamber access Universal double hook and loop attachment for use on bolt-action and semi-automatic rifles Internal cage design maintains bag shape Heat-resistant mesh bag 100 round capacity (223) with a zippered bottom for easy brass removal