GG&G Mossberg 590 Shockwave Side Saddle Shell Holder 5-Shot w/ The QD Sling Attachment And Rectangular QD Swivel Black. The GG&G Remington Tac-14 Side Saddle facilitates loading the mag tube and the chamber. Specifications for GG&G Mossberg 590 Shockwave Side Saddle Shell Holder 5-Shot: Manufacturer: GG&G Color: Black Condition: New Finish: Type III hard coat anodized matte black per Mil-Spec Country of Origin: USA Fabric/Material: 6061-T6 Aluminum Gun Make: Mossberg Package Contents: GG&G Mossberg 590 Shockwave Side Saddle Shell Holder 5-Shot GG&G GGG-2002: Mossberg 590 Shockwave Side Saddle Shell Holder 5-Shot w/ The QD Sling Attachment And Rectangular QD Swivel Black