The Rival Arms Magwell directs the magazine to load quickly and easily without taking time to look or feel for proper alignment. You didn't show up to the range with just one mag; don't waste time getting to the next one. FeaturesCNC machine aluminumIncludes grip plugHand inspected for accuracy 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.