Northtac M-10: The Northtac M-10 is designed to offer the largest sight picture of any Northtac optic. Featuring a 38mm objective and programmable electronics the Auto-Shutoff and Shake Activation features save on the lifetime of the battery and the enclosure keeps out unwanted dust and debris. The solid aluminum encased housing protects the optic from all angles and the clickable turrets make setting and holding zero easy. With 12 brightness settings and premium lens coating this optic works on a variety of applications and platforms.