PCC mag wells from solid aircraft grade aluminum bar stock. Other mag wells are made of nylon or plastic. Advanced Weapons Technology’s mag wells are CNC machined from the highest grade materials available. We have also made a single slope internal design that does not have a step on the inner wall of the mag well that may catch on the magazine during the reloading process. Another feature is the external locking screw that allows the mag funnel to be positioned more accurately while eliminating the screw hole on the inside of the mag well that may snag the magazine as well.