I recieved a flyer from Brownells with my last order for a new gun cleanr call M-Pro 7. It was developed for the F-16 gun systems. I sent for some and it is great. It will take carbon out of the pores of the steel. I took several guns that I had cleaned as good as I could with Hoppe's and Sweets, sprayed some M-Pro 7 in and brushed a little. After 5 minutes I patched them and the patches came out BLACK. I used it on my revolvers and it will take the rings off the front of the cylinders and I can see the steel in the throats now. This stuff has no odor, is biodegradable, non toxic and will not harm a gun. They also sell a gell and a CLP oil which all are the best I have tried. No going back now.