The pearce grip extension replaces the magazine floor plate adding approximately one inch additional length resulting in better control and comfort without altering the capacity of the factory magazine.These units increase the grip length of the sub compact glock auto pistols with out increasing their capacity.Caliber: Grip ExtensionCapacity: Grip ExtensionFinish: TexturedModel: Grip ExtensionMaterial: PolymerModel Fit: G26,27,33,39Brand Fit: Glock