There's another thread where Magpul and KAC speak highly of Fire Clean. And then there's this test.
http://www.luckygunner.com/labs/bras...el-cased-ammo/
"Cleaning and Lubrication
A cleaning and lubrication schedule was followed – at 2,500 and 7,500 rounds, the bolt carrier group was wiped down with a paper towel, and at 5,000 rounds, a detailed cleaning was undertaken. A single drop of FireClean lubricant was applied to the cam pin hole of the bolt carrier group every 1,000 rounds, and six drops were used after each of the aforementioned cleaning intervals. Certain small parts were replaced as needed, and they will be discussed later in the article. After all initial tests were complete, the bulk of the shooting commenced."