This extension replaces the magazine floor plate adding approximately 3/4" additional length resulting in better control and comfort without altering the capacity of the factory magazine.This extension is slightly longer than the one provided by the factory (actual length 0.820") and incorporates the factory texture pattern as well as an ergonomic curve for better grip.Caliber: 9mm LugerCapacity: Grip ExtensionFinish: TexturedModel: Grip ExtensionMaterial: PolymerModel Fit: G43Brand Fit: Glock