Product DescriptionThe Mesa Tactical SureShell Polymer Carrier with Saddle Rail is an all-in-one side saddle and optic-ready rail solution for Benelli M4 12-gauge shotguns. It combines an injection-molded, glass-filled polymer 6-shell carrier with a lightweight aluminum back plate featuring brass threaded inserts for a secure receiver mount. An innovative dual rubber friction system helps keep shells firmly retained under recoil. Up top, the integrated Picatinny rail is machined from aircraft-grade 6061-T6 aluminum and finished with a durable, non-glare mil-spec hard anodize, providing a robust platform for mounting optics and other accessories. Built to MIL-STD-1913 specifications, installation requires no gunsmithing.Product Highlights 6-round SureShell polymer side saddle keeps 12-gauge shells accessible on the left side of the receiver 5.5-inch MIL-STD-1913 Picatinny rail supports optics such as red dots and other accessories Aircraft-grade 6061-T6 aluminum rail with hard-anodized matte, non-glare finish for durability Glass-filled polymer shell holders with dual rubber friction retention for reliable shell hold No-gunsmithing installation using an aluminum back plate with brass threaded insertsSpecs Brand: Mesa Tactical Product Line: SureShell Polymer Carrier with Saddle Rail Compatibility: Benelli M4 (12-gauge models) Gauge: 12 Gauge Shell Capacity: 6 shells Mount Position: Left side of receiver Rail Type: Picatinny (MIL-STD-1913) Rail Length: 5.5 in (5 1/2 in) Rail Material: 6061-T6 aluminum (aircraft grade) Carrier Material: Glass-filled polymer (injection molded) Back Plate: Lightweight aluminum with brass threaded inserts Finish/Color: Matte finish, Black Installation: No gunsmithing required UPC: 878405004479 Manufacturer Part Number: 94930Disclaimer: 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.