The ETS Magazine for Glock 20, 29, and 40 features a translucent body which allows you to see your ammo count and type. The Magazine is also creep resistant, and the feed lips as well as the body won't spread when being stored long term even when fully loaded. The ETS magazine is resistant to harsh chemicals including heat and cold as well as UV resistant, meaning it won't become brittle over time even when exposed to harsh environments or extreme cold. The ETS magazine is a unique accessory and makes for a perfect addition to your Glock parts arsenal. FeaturesCompatible with Gen 1 through Gen 4 GlocksCompatible with Glock and aftermarket floorplatesEasy disassembly with specially designed baseplateErgonomically designed floorplate makes it easy to grab from mag pouches 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.