Keep an extra 6 rounds of 12ga shells handy with this ABS plastic shell carrier fitted to butt stock or receiver. Supplied with adhesive backed velcro, so the shell holder can be easily attached and removed. HOWEVER, velcor works great but adhesive backing is rubbish and carrier just falls off when loaded up. Best thing to do is remove adhesive tape and use some type of epoxy glue if you want to use the velcro system. Alternatively, if you have some basic home handyman skill, drill a minimum of 3 small holes as indicated in the pic, and use small screws (not included) to affix to your wood or plastic butt stock. There is a slight amount of flex between the shell clips to insert a small headed screw and small screwdriver. "Of course ammo not included"