They look like rough over priced cheap junk with rough plastic stock and forearm castings and the machining looked horrible. The one I picked up at the gun store was the "marine" version and it stuck like crap when you tried racking the forearm. Even the folding stock looked rough and the stamping over the sheet metal had rough edges.
Buy a real gun for the $300-400 they want fore these Hatsan things you can buy a real gun like an 870, Mossberg or a new Winchester SXP although made in Turkey they are made to quality standards.