I have a magnum force front end that was in a car that I bought was installed but never really driven. I known I've heard not so good things. I've bin searching for what actually breaks so I can try and fix before it happens but I'm not really able to find any good thanks in advance

I bought their upper a arms and they were .400 to narrow an then I'm told to pack sand so a pox on their house

What?

You were told to pound sand? Or pack it? Also, whats a pox?

They bought something at the bottom of the spec range, the supplier wouldn't replace it, the buyer got pissed, and now thinks they suck eggs and wishes them an ill fate.

Magnumforce's reputation is a tricky thing. They have made some crap, they have made some decent stuff. Some think they are okay. If you are really scared to use their stuff, replace it with stock stuff and sell it. There is a decent secondary market for their things.