I received a Huntertown Arms Guardian during an ODT giveaway day, years ago. I always assumed the baffles were aluminum since they were so lightweight. I had a magnet laying on the table where I disassembled the suppressor and the baffles fairly FLEW to the magnet. The only aluminum pieces are the end cap and the tube. Who'd a thunk it? I guess I could have looked it up though. So, I'm guessing it's find to put the baffles in the ultrasonic cleaner with the Mean Green solution or something as caustic?