I thought it would be worse. I calculated roughly 15000 rounds through it this time with no cleaning or tear down. Not too shabby in my opinion. I thoroughly coat the baffles and insides of the tubes with moly grease so with the slightest tap they came out. I cleaned the tubes and outer portion of the baffles as well as the end cap and I’m gonna keep going. Maybe at 20k I’ll run the baffles through the stainless pin tumbler. The second stack isn’t nearly as dirty as it probably only has 6000 of the last 15000 through it. I’ve been using it mostly in the K configuration on my 10/22 or Ruger American Rimfire. Love it, I’m torn on getting another or something similar.