I picked up some samples of Lucas Extreme Duty Gun Oil (Not the CLP) at a USPSA club. I've used it to lube an AR and I've also used it on a few pistols. The Extreme Duty Gun Oil has some kind of tackifier in it that makes it very clingy, almost like a semi-liquid grease. It doesn't seem to stay in place better than a standard oil.
I'm not sure if the Extreme Duty CLP would do the same or not but, I think their Extreme Duty Gun Oil is a decent product.
The main thing that I found objectionable to the Extreme Duty Gun Oil was the smell. It seems like Lucas purposely tried to perfume it, maybe some kind of berry scent, it definitely has a perfumed odor to it. However, it still smells strongly of additives, almost like a gear oil.