The EXPS3 HD advances EOTECH's legacy of holographic excellence, integrating a side rotary dial, adaptive auto-brightness, and rapid-activation shake-awake inside a durable ALL-ALUMINUM housing. EOTECH's proven reliability and performance remain at the core of the EXPS3 HD, now with enhanced functionality and design. It delivers the same fast, both-eyes-open engagement but with greater peripheral awareness thanks to the removal of the traditional protective hood. The left-side rotary dial maintains compatibility with magniers, offering unobstructed access to controls, and the 1.74" centerline height supports a lower 1/3 co-witness with iron sights. How do you improve a legendary optic? The EXPS3 HD is your answer. Additional reticles available soon.