From I see doing some minor digging, they are made by KRAL. KRAL makes Tristar. With a $600 budget, I would be looking at a decent pump(Browning BPS, Benelli, Remington Wingmaster), not an economy O/U. If she wants an O/U that will hold up to some use, she needs to at least double her budget, the least expensive, well made O/U is the Winchester 101 field, they start at $1500 new, a used Browning or Beretta can be had in that same price range would be money better spent then the Hunt Group O/U.