These lightweight laser sights have a bright 632nm laser with a four point alignment system to maintain accuracy and calibration. Made of 6061-T6 aircraft aluminum alloy, they are engineered to withstand tough conditions. The 1.25oz KT-6132 model comes with a rail mount to fit virtually any weapon with an integrated rail. The 1.6 oz model KT-6332 has an integrated rail mount small enough to fit most, even compact, pistols. They operate with an on/off switch or the included detachable pressure pad switch.