CQBL Laser+M600C/M300A Flashlight+Dual Control Pressure Switch. Dual Control Pressure Switch Fit:Mlok Keymod 20mm Picatinny Rail. M600C Flashlight:600Lumens, M300A Flashlight:400Lumens. CQBL Fit: 20mm picatinny rail. Laser type: Red / Green / Blue / IR. Battery: 16340 or Cr123a.