Sig's Romeo4T Red dot is designed for modern semi-auto pistols, MSR platforms and shotguns. Best for short and medium range engagements and recreational shooting across a wide range of calibers and light conditions. Fully ruggedized and impact resistant for tough environments. Features MOTAC Motion Activated Illumination System, unlimited eye-relief, red LED illumination for daylight visibility and extended runtime and 1.41 riser mount with additional lower 1/3 co-witness spacer. Includes see-through lens covers and hex bolt mount.