These shells are user reloadable with BBs for the Maruzen M870 and M1100 series shotguns. Each shell can take anywhere from 1 to 10 BBs at a time.
Get a shotgun sling mount with shell holders for your shotgun, or get a cheekpad shell holder to hold your shells!
Disclaimer: All aftermarket upgrade parts require necessary skill or modification to install and assemble, please consult with your airsoft technician if needed.