The 403B is a small compact micro red dot optic. Employing Holosun’s LED technology, the lifetime for one CR2032 battery can be up to 5 years. This optic features our “Shake Awake” technology that powers the optic on with slight movement of the 403B. It may be installed on various firearms such as shotguns, pistols ,air rifles and crossbows. The HS403B is compatible with standard mounts. Don't let the price fool you, the quality is second to none.
Designed for day and night use
New advanced technology LED allows up to 50,000 hours of operation on one CR2032 battery