Cyelee CAT Green Dot is the ideal sight for concealed carry and self-defense. It is made with the Shield RMSc footprint, and with a true 50,000 hour battery life and MDS Mode(Motion Deactivated Standby) to extend that life. The battery on the CAT green dot is located underneath the device, allowing for co-witness(may require extended height front iron sights) despite its compact size. Perfect for subcompact guns, and it is notoriously durable – utilizing an aluminum alloy housing, IPX7 waterproof, shockproof, the CAT green dot is good to go.