Is that the one? That's my Optima Pro 12 gauge.
I like it and have killed a bird with it loaded with Hevi Shot. If I were to do it again, I think I would go with the TK2000, mostly for the bigger payload. I got this gun during the time the Knight was no longer making the TK2000. I contacted CVA and they told me they had like 4 left at the time, and I believe I paid 300 before shipping. I was in contact with CVA and read through the manual, and they told me 1 1/4 ounce by VOLUME was the maximum. I forget how much that came out to in weight, but I'm pretty sure the TK2000 accepts a bigger payload. I like the gun and will tinker with it some more. I don't think I'm going to hunt with it this year since I have a new 12 gauge choke to break in and I'm going to give the 20 gauge another run this year.
It has the same thread for chokes as the Mossberg 535 does, which is great for me since that's what my 12 gauge is. The Invector/Winchoke thread.