The optics forum here has relatively old info and doesn't get visited much but if this gets moved over there then so be it. I am looking for a red dot and have limited my choices now to the Primary Arms Advanced 2, Sig Romeo 5, Holosun Paralow 503 and Vortex SPARC II or Spitfire. I am not going to spend more than these. If I can get it in FDE, even better. Vortex might be the only one not in FDE. It will mount to a Ruger AR556 that is crazy accurate and tight groups with iron sights. This is just for fun basically. Has anyone bought one recently?