I just want to add that I have changed two upper arms on the Skinz this year, the lower are stronger than stock, but the upper is very weak, they come loose in the weld to the cylindric center piece.
I also broke one upper bolt, the one that connects to spindel from top.
On the other hand I had to replace one lower Polaris standard arm when waiting on Skinz spares....
Perhaps better to stay in the garage...
It can happen to any of them. I am still on original set on mine and took a big enough hit to a rock that is gouged my spindle pretty bad. A-arms look great.