This Primary Arms MicroPrism is part of the SLx optics line. SLx optics have built a reputation for innovation, reliability, and value. All SLx optics undergo rigorous field testing during development to best serve you in any environment. The SLx 3x MicroPrism is an all-new advanced optical system that combines the compact, lightweight design of a microdot with the durability and precision of a 3x magnified optic. The SLx 3x MicroPrism offers 13 illumination settings, AutoLive motion-sensing on/off technology, and multiple night-vision compatibility options.