The standard mainspring housing features a precision-machined slot and a drilled and tapped hole at the bottom. This advanced two-piece design facilitates the straight forward, drop-in installation of the included magwell and allows for its quick removal within seconds, without the need to disassemble the pistol. It significantly enlarges the magazine well opening, ensuring seamless magazine changes and rapid reloading. No modifications to the grip are necessary. Internal components are not included but can be purchased separately if required. The Ed Brown 1911 Magwell housing offers a robust and lightweight enhancement, facilitating quicker and more efficient reloads