Bundle includes 2 items – StrikeFire 2 (SF-RG-501) and VMX 3T Multiplier allowing Red/Green dot selection with 3x magnification. VMX 3T(VMX-3T) features a flip mount to provide the choice of 3x or no magnification. When situations demand split-second target acquisition and maximum field of view, mount up the StrikeFire II and shoot-both eyes open. Feature-rich, versatile and reliable, the StrikeFire II is a great choice for shooters who want a quality red dot sight, but don’t want to break the bank. Features sleek rear-facing controls for power on/off and easy adjustment of ten dot intensity levels (5 Green & 5 Red)-lowest two settings are night-vision compatible. Automatically returns to the last dot intensity used when powered up. The 30mm aluminum alloy chassis provides extra-high recoil rating and is waterproof and fogproof. Strike fast! The lower 1/3 co-witness cantilever mount model is ideal for flattop style rifles, positioning the optic bore center 40 mm above the base surface. Simple, fast, effective-the VMX-3T Magnifier will work with any of the Vortex 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 Flattop Rifle 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.