Sorry for posting so much but you guys and gals have helped me so much in such a short period of time. I've got two last questions. What do you clean the outside of your gun with. Rag and water? I just put on my second HK compensator. It seems the last one broke because my wife only tightened the bolts about half way. My fault. Someone mentioned a sealant you can put on the screws to help hold it. Anyone know anything about that?