Mesa Tactical SureShell Carrier and Rail Features The Mesa Tactical SureShell Polymer Carrier for the Benelli M4 uses shell holders injection molded from glass-filled polymer giving them impact resistance well beyond low-cost consumer shell holders. A dual rubber friction system grips each shotshell securely so it will not rattle loose or fall out during hard use yet the shells remain easy to strip off for a fast reload under stress. The carrier mounts to the receiver using a lightweight aluminum backplate secured with brass threaded inserts keeping the overall weight addition minimal. This six-shell capacity gives operators a meaningful increase in ready ammunition without needing a separate pouch or sling carrier. Machined from aircraft grade 6061-T6 aluminum the accompanying Picatinny rail is mil-spec hard anodized for a durable non-glare matte finish that holds up to field conditions. Manufactured to MIL-STD-1913 Picatinny specifications the rail provides a robust mounting platform for a variety of optical sights without requiring any gunsmithing for installation. Together the carrier and rail give the Benelli M4 both extended ammunition capacity and a reliable optics mounting solution in one package. Professional users who rely on their shotgun for duty or competition will appreciate the added capability this system delivers. Mesa Tactical SureShell Specifications Brand: Mesa Tactical Model: SureShell Type: Side Saddle Gauge: 12 Gauge Color: Black Material: Polymer Capacity: 6 Shells Length: 6 Height: 2 Compatible Hosts: Benelli M4 Available At: GrabAGun