The SureShell carrier system comprises a replacement anodized aluminum Picatinny optics rail which supports two machined shell carrier yolks. Small aluminum flanges on either side of the main rail can accept additional Picatinny rails to support weapon lights or lasers. A pair of unique steel recoil blocks featuring angled set screws ensure the rail assembly is securely mounted to the shotgun. Shell holders on each side of the KSG hold 6 12 gauge shells, for a total of 12. With shells on either side of the KSG, the user can fully utilize the KSG’s ability to store and switch between 2 different types of 12 gauge ammunition.