A &G Grip Extension for using full size magazines in the compact guns. That's right you can now use a Glock Model 17, 22, 31 or 37 Magazine in a G19, 23, 32 or 38. This new accessory slides over the magazine and adds length to the grip, so that the G19, 23, 32 and 38 pistols have the feel and the capacity of their respective bigger brothers. These are for full metal lined magazines only.