i`ve had the snova for a few years now. onr thing i can say is, they do attract rust in the magazine tube.
stripping it is easy, punch 2 pins and it clean in seconds.
be careful not to loose the rolled pin in the ejection section in the main body of the stock. its the thing that helps the extraction claw, the spring is for the extra tension when hulls are 70mm.
i totally grease mine up, take out the firing pin and clean it, it gets fithy fast.
also if your forend rattles, you can tighten it up using the allen key screws on the sides of the forend, these will naturally loosen with time, just tighten 1/4 turn then check if it pumps smooth.
firt time i took mine out i put 1000 steel shells through it.
great day.
Good deal, Paramainiac 20-05-07
Good deal, Snipperuk 11-09-10
Good deal, Skygrowler 13-10-10