My M135GX had it - simple manual shutoff valve outside, then hose to the accumulator. Dealer installed option - my dealer mechanic didn’t tighten the hose and I lost a lot of fluid first time - got to watch those people as they just installed it including the decal and didn’t try it out. It is standard on my M7, controlled from touch screen in the cab. That plus the front suspension which has 2 accumulators and I can really gather large round bales quickly - like 20 mph working speed in the field. Realized the difference when I needed to use my nephews
M110GX this summer for a day. No KRS and it was bone jarring let alone fear of damaging the loader.