The Zev Technologies PRO magwell is slightly flared at the base to be wider than the stock opening, which is ideal for quickly inserting the magazine in the pistol during reloads helping build proper muscle memory for improved consistency and reload time. This ZEV Technologies PRO Magwell is a great addition for any shooter looking for an edge with out the bulk flared competition style magwell. The addition of a magwell will also help keep the users hand in place while shooting. The light weight aluminum construction will not effect the balance of your Glock handgun. Installation is simple with the provided allen wrench, no gunsmithing required. FeaturesFaster reloads1-Piece designEasy installationDurable finish 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.