ZEV Technologies PRO Magwell 1st-4th Gen GLOCK Aluminum 1 piece design finished in a black smooth Anodized - includes magwell, screw and wrench. --The 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 help keep the users hand in place while shooting. ZEV Technologies parts always incorporate design, feel and performance. Finally, all ZEV Magwell components are designed to last, ZEV products are machined using quality aluminum materials. Compatible with Glocks G19, G23, G38, and G32