The SIDE SADDLE SHELL HOLDER by LYMAN is a lightweight, molded-nylon carrier that allows for quick access to 6 additional 12 GA shotgun rounds without permanent alterations to Mossberg 500.
An aluminum mounting plate is included for easy installation using existing pin/screw holes, and a special window design on some models does not obstruct the firearm's serial number.
The shell holder requires adequate clearance on the shotgun, necessitating modifications or replacement of field-grade forends that extend onto the sides of the receiver.