Grip Extension For GLOCK GEN 3 model 26/27/28/33/39 For use on third generation magazines. These units replace the magazine base plate and retain all other factory components. They do not alter the capacity of the magazine. These units will add 5/8" additional length for better control and comfort.*** For 4th/5th Generation magazines use product PG-G526 *ALSO FITS GLOCK 28 (380 ACP)Key Benefits These units blend with the contours and texture of the handgun giving a factory appearance. Made from High Impact Polymer and withstand drop tests at temperatures from -20 F to 250 F. They form the next logical finger positioning feature to provide control and comfort without sacrificing conceal ability. Provides magazine identification via Mag-Track for those that rotate magazine usage. DISCLAIMER: 'GLOCK' is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither Pearce Grip, Inc. nor this site are affiliated in any manner. This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.