The X-Grip Magazine Adapter allows shooters to use full size magazines in compact or sub-compact pistol frames. Adapter slides down magazine and creates a flush fit when magazine is fully seated. Made from high impact polymer for light weight and durability. This adapter is designed so the Glock 17 and 22 magazines can be used in the Glock 26 and 27.Notes:Compatible with Gen 3 or Gen 4 factory G17 or G22 magazines. Does not fit Gen 1 or Gen 2. DISCLAIMER: 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.