I've used it to clean my M91/30 since I got it. Damn thing was made in 1943. Old, beat-up, and has about 800 rounds through it (that I know of). Still works fine thanks to CLP.
Not bad on my AR as well, although I do admit that the stink will follow if youre CCW
Mosin Nagant M91/30
AR-15 .223 (Spikes lower/A4 upper)