Loneatar square tube swing arms are hot garbage. I snapped chain side tube threw. I would never buy any square tube swing ARM ever again let alone a lonstar. As far as warranty good luck with that. I had my welder add angled plates all over joining all tubes together and sandwiched around the broken tube yes it last the rest of the season.
My opinion buy a wheelman swing ARM!!! No I don't own one in future he will get my order but this guy has all the weak spots and flaws worked out and uses quality material!