X-GRIP magazine adapters are quality made items that expand the functionality of your magazines. These mag collars allow the user to use the same mag in several different pistols or for use of full size mags in the compact versions of a firearm. Brands that X-GRIP adapters are made for include HK, Beretta, Sig Sauer, Glock, Smith & Wesson and more. Each X-GRIP adapter is made for specific models to allow the interchanging of mags all while providing an extended grip and flowing design that extends the handgun. X-GRIP products are made of quality materials and are easy to install.