A firearm handgrip with integrated safety lock system includes a handgrip having a plurality of connectors, a generally hollow interior space and an aperture, An elongated retractable plate is positioned within the aperture and is connected to a plate alignment unit located within the interior space of the handgrip. The plate transitions between an extended position and a retracted position. In the extended position, the plate physically engages the firearm's integrated safety mechanism to maintain the same in the “safe” position. The system further includes a biometric authentication system, an electromechanical latch and an internal controller.