I bought a Stag 2T a couple of weeks ago with the quad rail. I love it. I researched reviews for months before I bought it. As far as sights it depends on your price range. If you want to spend 500 or more look at Acogg or Eotech. I am saving up for an Acogg so I ordered a Vortex Strikefire red dot to hold me over for now. I have seen a lot of good reviews on them and they run 150-160 bucks. If you go with the Vortex order the red dot not red/ green. Everyone says the option with just red is a lot brighter and easier to see on bright sunny days.