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I have an EXPS2 with the Vortex magnifier and it works like a charm
The glass is not quite as good but still very clear with a good warranty, not to mention cheaper
It has a plate you can install or remove depending on whether you want lower 1/3 or co-witness
Nick
Have an Eotech XPS 2-2 that I ran with a sightmark magnifier. Never had an issue with it. Strangely, the only issues I had was sightmark reflex sight with sightmark magnifier.