I have been using the Slip 2000 carbon Killer. Makes cleaning so much easier. I thought it was a little over priced until I started using it. Just drop my bolt and carrier into the handy plastic container it comes in, go about the rest of my cleaning, come back in 15 minutes, pull the parts out and hit them with a tooth brush. Carbon wipes right off! I have never seen anything like this before. The thing is, this stuff lasts for ever. A Marine buddy of mine has been using his product for at least 2 years he tells me. He said that everyone in the theater has been ordering it and using the heck out of it. After trying the Carbon Killer with great sucess, I have started using the new Slip EWL also. Been reading and hearing a lot about it also. Sounds like it keeps carbon from sticking. Anyway, sorry for the rant, not a commercial here, just had to pass this on because it has stopped me from spending so much time scrapping the carbon off.