FREE Aimpoint QRP (Quick Release Picatinny) ring mount ($96.95 value).
The Aimpoint CompC3 is the commercial version of the military Aimpoint CompML3. The only difference is the C3 is submersible to 17' instead of 150'. You save an additional $78. dollars by choosing the CompC3 over the CompML3.
CompC3 also includes factory lens covers and a standard low Weaver style mounting ring. You get everything for $388.95 which is the price of just the sight by its self.
The CompC3 uses the latest circuit technology from Aimpiont that allows the battery to run for 50,000 hours on setting 7 or be stored for 10 years and still work. This is 5x longer than the CompM2 or CompML2.