3-slot Picatinny rail.
Thinner vertical grip for improved control and less conspicuous concealed carry.
Removable wrap-around grip that can be swapped between the Vertec-style and ‘old’ M9 style.
Removable sights so that users can select the sight’s material and construction (e.g. luminescent dot sights for dark situations, or taller sights for use with a suppressor).
Universal slide, which makes the gun convertible from decocker-safety to decocker-only mode.
Sand-resistant magazine with bevelled shape for blind reloading.