Vortex Optics VMX3 3x Magnifier for the SPARC and StrikeFire Red Dots.

With 3x magnification and a durable armored construction, the Vortex VMX3 magnifier can be used to quickly add precise, longer ranging ability to red dot type sights-including the Vortex SPARC and StrikeFire red dots. The VMX3 is easy to use and does not require any special sight-in. Just zero-in the red dot scope as normal, then add the VMX3 behind the scope for the additional magnification.