A device to capture pressure data from a weapon's foregrip during live fire, the weapon having a Picatinny accessory rail, the device comprising a plurality of sensor bodies that are mountable to the Picatinny accessory rail, each sensor body having a pressure sensitive region that can capture pressure data placed on the pressure sensitive region, each sensor body having channels that correspond to the Picatinny accessory rail, retention latch system that attaches the sensor body to the weapon; and, a communication assembly that allows data communication between the plurality of sensor bodies and a computer.