This vertgrip can be mounted to a rail and placed right in front of the magazine well for a close grip, or can be mounted farther forward for an extended vertgrip. The rail mounted vertical grip sports two pressure pad slots.
The pressure pad slots in the magwell grip are an improved design over older styles in that there's a rubber cap over a hollow slot. Any pressure switch can be fit inside the hollow slot, and the rubber cap replaced over it. This keeps smaller pressure pads in place and accommodates most common pressure switches.