This is a Dummy magazine extension for the Ruger style replica rifle. Same length and size of the original carbine magazine. This is attached to the bottom of the factory magazine giving it the look of the carbine style magazine. Great for re-enactment. Made of durable PLA material. Simply glue this on to the base with hot glue or most any kind of adhesive. Very snug fit into the bottom of the magazine. Makes it easier to remove and insert your 10 round factory magazine. Magazine is not included or any other part.