Abstract: A device for catching and holding rifle shell casings ejected from a conventional M16 or like rifle includes a deflector body mounted between the handle and main body portions of the rifle by a spring-loaded detent assembly engageable in an opening conventionally formed in the rifle handle, thereby positioning the deflector body adjacent the shell ejection port of the rifle body. A shell collection bag is removably attached to the deflector body to receive and contain shells discharged through the ejection port.