Does anyone have the Bad Dawg rear bumper If so does it still allow the bed to dump fully
Yes it does.
With the stock pxt 26 inch tires it does not hit the tires.
With a larger tire installed, 27+, without a lift, it will probably rest on the tires.
The bumper IMO is well made and looks good.
Tip: when the bumper gets wet, it is slick on the top. I installed a traction strip on the top, my son likes climbing in and out of the bed, I did this for safety reasons.