The Vortex VMX-3T gives users the option of magnified and unmagnified shooting at the push of a button. For close range shots, simply hit the push button to disengage the lock and the VMX-3T flips off to the side. For longer ranges, the VMX-3T can be quickly engaged and provides 3x magnification with amble light transmission. The Vortex VMX-3T is compatible with virtually any AR-height red dot sight and allows for 1/3 or absolute co-witness mounting heights.