Does the 5th-Wheel-to-Gooseneck Coupler Adapter Mounting Plate for MORryde Pin Boxes Come Painted?  

Black as black can be. Just like the one already there that's removed with this installation. This basically eliminates the majority of the movement of the pin box, as little as there is.

My adapted was black and did not need to be painted. Worked very well.

My plate came painted; not sure I would classify it as powdercoated. It is reinforced somewhat over the factory Morryde plate, but not as much as I would have hoped. The main benefit comes from the four new poly blocks which keep the plate from trying to rotate. My only real complaint is that they should have offset the pin by 4". Since the Anderson adapter moves the connection centerline by roughly 4", it will either move your pivot point back 4" or forward 4" depending on which way you set it. I had mine back 4", but then the back of the pin box wanted to contact the bedsides during tight u-turns. I ended up setting mine in the 4" forward position which fixed that issue, and luckily my Arctic Fox as a sculpted nose to allow for extra clearance. You most likely wouldn't be able to do that with a square nose trailer.

It came painted black, worked great with the PullRight SuperLite. i felt the PullRite was better built and I really liked the "release mechanism" on the PullRite.