I purchased a Sulun Tac 12.
The early batch had some quality control issues. The breech bolt latch on a lot of the early copies required filing to make the indent square - mine did. The amount of material that has to be removed is minor. Without the fix, the gun will not feed. With the fix, the gun operates flawlessly. There is a video that shows how to make the fix.
They all come with five chokes.
Mine feeds light skeet loads with no issues. The heavier Winchester Super X works perfect, too.
It is well worth the $660 I paid (shipping included).
Square might be incorrect. Look at the video. https://www.youtube.com/watch?v=R0T9qj1NHxU