A &G Grip Extension for using Hi-Capacity Magazines in the Glock Models 26,27,33. That's right you can now use a Glock Model 17 or 19 Hi-Cap Mag in a G26 or a Glock Model 22 or 23 Hi-Cap Mag in a G27 or G33, or you can use Model 20 or 21 high-cap mags in your Model 29 or 30. This new accessory slides over the magazine and adds length to the grip, so that the G-26,27,33,29,30 pistols have the feel and the capacity of their respective bigger brothers. *Specify whether you have Fully Metal Lined Mags (FML) or Non Fully Metal Lined (NFML) Magazines, when you order.