Product Description TacStar&';s SideSaddle mounts extra shotgun rounds right on the receiver for quick, reliable reloading. This 4-round shell carrier features a durable polymer holder secured to a rugged aluminum mounting plate that installs directly to Mossberg 500/590 receivers, with clearance for long forends. All mounting screws and hardware are included, and no gunsmithing is required. Ideal for hunting, competition, or home-defense configurations. Product Highlights Four-round SideSaddle keeps shells secure and within easy reach Fits Mossberg 500/590 12-gauge shotguns; receiver-mounted design Rugged polymer shellholder with aluminum backing plate for strength Clearance for long forends; installs with included hardware No gunsmithing required for straightforward installation Specs Product Model: SideSaddle Fit: Mossberg 500/590 Gauge: 12 Gauge Capacity: 4 rounds Material: Polymer shell carrier with aluminum mounting plate Mount Type: Receiver Color/Finish: Black; Smooth Dimensions (L x W x H): 8.6 x 3.3 x 1.7 inches Weight: 0.25 lb UPC: 751103011676 Manufacturer Part Number: 1081167 Brand Name: TacStar Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.