I was cleaning guns after shooting last week and came to the Silencer Shop Sparrow I have for my .22's. I had disassembled it before but not after using it. I figured it was time after about 300 rounds. Had to be tapped with a dowel and small brass hammer to get it out. Then trying to clean the lead off of the clam shell halves took some judicious scraping to remove. Got it all cleaned out and back together. I will clean it after each use from now on. Glad this isn't required on center fire guns!