But for someone using the piece to commit murder or armed robbery, if not too bulky or 'kludgey', the catcher would serve better than hunting around for brass.
It was actually quite bulky. It consisted of a fist-sized egg shaped hollow plastic piece with a hole toward the ejection port. It clipped to the grip and sat about one inch from the slide. The mesh bag was attached to the bottom and caught the brass after it was ejected into the plastic "egg."
If I could find it in the basement with my other firearms relic pieces I would get a photo for you but it would takes me an hour or so. I work tonight so I could do it and post the thing tomorrow if you would like.