Integy arms?
 

I've seen the Integy arms, they look really light, same design as the stock arms but thiner.

Has anyone had experience with these? Are they light as RPM?

Integy Type 3, Pro suspension arms.

Looks similar to the UE RacerX.

I have the racer copy. I have not had no complaints about theses arms. They made the truck handle excellent. They are kind of light for aluminum as well. My truck was 14 lbs ready to run at one time with the rpm arms and knuckles. I have got some weight off with the racer copy now. It could have been the tire change as well as the other stuff.