Simple, fast, effective?the VMX-3T Magnifier will work with any of our red dots but it is not recommended for use with the prism scopes. The push-button design of the VMX-3T engages and disengages the flip-mount, allowing the magnifier to lock in place. The result, 3x magnified or unmagnified views at will. Optics are fully multi-coated for optimal light transmission. Lightweight and tough; hard-coat-anodized machined-aluminum construction ensures durability. Internally nitrogen purged for reliable waterproof/fogproof performance. Ultimate magnified versatility for virtually any AR-height red dot sight. Allows for lower 1/3 or absolute co-witness mounting heights and is ideal for shooters who want to increase the effective range of their red dot sight. Fully Multi-Coated Lenses - Increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces. Waterproof - O-ring seals prevent moisture, dust, and debris from getting inside the tube for reliable performance in all environments. Fogproof Barrels are filled with nitrogen gas to inhibit internal fogging. Matte Black Finish Hard-coat anodized for durability.