This unit replaces the magazine base plate and retains all other factory components. The grip extension does not alter the capacity of the magazine. Made to work with the factory Ruger 10 round magazines. Designed to provide better comfort and control by adding approximately 3/4 of gripping surface. These extensions will only fit the LCP MAX in .380 cal. - Key Benefits - These units blend with the contours and texture of the handgun giving a factory appearance. - They are made from High Impact Polymer and withstand drop tests at temperatures from -20 F to 250 F.