The GG&G Mossberg 590 Side Saddle Shell Holder is designed to facilitate quick loading of the magazine tube and chamber in tactical situations. This shell holder is specifically compatible with short tactical length forearms, making it an ideal upgrade for Mossberg 590 shotguns. Crafted from durable 6061-T6 aluminum, it features a non-marring backing plate to protect your firearm's finish. Installation requires no modifications to the weapon, making it a straightforward enhancement for your shotgun setup.