Update**
I had a minor issue tapping the rubber spacer out of the WE buffer tube. It was glued in there like a mofo. So, I ran to Rona and picked up some metal and rubber washers. I couldn't find plastic washers big enough so that they don't move around on the inside.
I decided to mix them up so i get both cushion from the rubber and stiffness from the metal.These washers were snug in the buffer tube so they are not going anywhere.
This is what she looks like now
Big Thanks to Drake and Redneck for answering my questions.
For you guys wondering if clone UBR will fit your WE gbbr, here's your answer!
# WE gbbr clone UBR stock (Huang's