Rugged, reliable red dot sight for challenging conditions The Aimpoint CompM4s is built for professionals who demand performance under extreme conditions. Its high-strength aluminum alloy housing is coated with a non-reflective hard-anodized finish, and the sight is sealed against the elements, submersible to 150 feet. The 2 MOA red dot reticle supports fast, on-target acquisition across lighting conditions, helping shooters react quickly in high-stakes scenarios. Durability you can trust The optics are designed to endure the rigors of field use from rain and dust to temperature shifts. The rugged body and precise internal assembly contribute to a consistent sight picture and reliability when it matters most. Advanced lens system for better light transmission and optical clarity High quality components Includes anti-reflective device Over 8 years of continuous operation using one AA battery Customizable with a full line of accessories available Long battery life and flexible power options Power is user-friendly: it's electronically regulated to work with any AA size battery available worldwide, and the design emphasizes long runtimes. In ideal daytime use, some specs note operation of up to 80,000 hours on a single AA. Clear aiming, even in tough environments The CompM4s features an absolute co-witness with iron sights and is parallax-free. The 2 MOA dot offers fast target acquisition, while the front lens thread opening allows for a screw-in anti-reflection device (ARD) for glare reduction in bright conditions. KillFlash anti-reflection device included Black rubber bikini-style lens covers protect the glass What you get and why it matters Everything in this sight is built to perform when the going gets tough. Combine the durability with modular accessories to tailor the setup to your needs—whether it's professional duty use, competition, or field training. FAQ Q: What are the key durability features of the Aimpoint CompM4s? A: Weather-sealed aluminum housing, non-reflective finish, submersible to 150 ft, and rugged optics for tough environments. Q: How long can you expect operation with AA batteries? A: Up to 80,000 hours of daytime operation with one AA; the spec notes up to 500,000 hours with a single AA.