The ATPIAL-C is a MILSPEC laser system" taken off the same production line as its full power counterpart" the ATPIAL. The only difference is the ATPIAL-C is fitted with a Class1 infrared laser pointer diode and Class 3R infrared laser illuminator (fixed focus – non rotating and epoxied in place) diode" instead of the full power (restricted) Class IIIb diodes. All other parts" components" and accessories are exactly the same as the standard issue AN/PEQ-15. The Red Visible and Infrared Laser Pointers are slaved so that zeroing one will zero the other in tandem. The Infrared Laser Illuminator is a true laser illuminator system" producing no bright downrange visible signature as seen in infrared LED's. In order to stay within civilian legal guidelines" the Illuminator is lower power" able to reach 150 yards and is non-adjustable. This is perfect for short to medium range engagements. Like the full power ATPIAL" the ATPIAL-C's Infrared Illuminator can be used to wash out the bloom of the Infrared Laser Pointer at engagement distances.