The SI center axis targeting sight is designed as an auxiliary aiming device to assist in acquiring a flash sight picture in very low or zero light conditions. Traditional three dot systems can present clutter and can be difficult or slow to orient in the dark. The CAT sight allows one to quickly index the firearm and roughly align the existing sights while allowing the user to maintain target focus. The sight is end user configurable to use preferred aiming solution such as a tritium lamp, fiber optic, high polish reflective rod, or a chargeable luminescent source affordably and is universal to nearly any firearm. Please review the important disclaimers about this product below.