I've used this cleaner on a few guns and can say it works, but the oil itself is actually a pretty good cleaner. Is it better than very strong solvents or even Hopps' solvent? Probably no. I couldn't find an MSDS, so who knows what it says or how "green" it really is. I think it's made out of something like vegetable oil or something. When it gets on my hands it feels and smells like vegetable oil, not mineral based oil. In the past I've heard of other gun oil companies using organic oils to make "green" products. I think the big one in the past was fireproof or something like that. This is probably not the same as vegetable oil, however, since cooking oils go rancid. It probably has stabilizer bars and other stuff in there but who knows as I couldn't find any specs. However, in layman's terms, it works well enough to clean and lightly oil the gun (although I wouldn't use it on expensive or blued finishes until I can prove it doesn't cause problems). The price at this point north of the rampant CLP and per ounce is probably a lot more expensive than a jug of engine oil and a can of spirits that people who shoot a lot AR15s typically use. You can also just use soap and water, as Paul Harrell points out on YouTube. My point is that if you want to be eco-friendly or efficient, you don't have to use certain products. I think soap and water are the most environmentally friendly, but you can't do that with every gun. So it cleans the oil, probably cleans and protects well enough, but for the money it's very expensive. Also, the bottle is annoying as I keep spraying it wrong when I try to use it. But yeah, it seems ok if you're willing to pay money for it and get by without SDS.
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