Holosun 507C is coming out in green dot soon. I am holding out until then. I am selling my MRO and bought a Holosun 510c for an AR in green and so far its held up good and we have banged it around. I only have about 750 rounds using it, but the Holosun Elite series are pretty good. Ryan at Apex told me that they are trying to sell to the military so they have upped their game. If you haven't seen a green dot it is VERY visible. I pick it up much much better than a red dot. I also have a vortex on a Canik SFX that needs to go back, i think it lasted two magazines before completely failing. I think Vortex low end stuff sucks. I don't want a lifetime warranty, i want stuff that doesn't break when i use it.