As you may know by now, I am looking to buy a BT9UC. They have one at my local shop and my fingers were itchy. I glad that I did not buy it yet.
I did some research today and called the Bersa distributor in New Jersey. Apparently, the BT9UC is being replaced by an upgraded model called the Bersa Thunder PRO 9mm UC.
The new "PRO" model has the upgraded polygonal(?) rifleing, picanny(?) rails for accessories, and something called a full mag indicator. That is what she told me. You tech heads may be able to shed some light on the above.
I hope this info helps for those looking to buy the BT9UC