One more time:
No company or individual has ever committed the resources for research and development of cleaning and lubricating products used in firearms under any and all conditions than the US Department of Defense has done.
GI surplus bore cleaner and lubricants are readily available at very little cost. I have several pint containers of bore solvent that I purchased over 30 years ago for $1 each, and I will never find anything better for removing copper fouling or powder residue at any price. I also have a dozen 4-oz. bottles of LSA (Lubricant, Small Arms) that I bought for less than $1 each, and there is nothing better under just about any conditions to be encountered.
Some of the new "miracle" products are little more than Canola oil, perhaps with an infusion of colorant or scent. What you can buy at the grocery store for $2 per quart may cost you $80 or $90 in 16 applicator bottles of 2 oz. each, but it won't do any better in use.
Outers GunSlick is a medium density grease with a high content of powdered graphite. Powdered graphite is readily available (used by locksmiths and others for dry lubrication of mechanisms) and can easily be combined with white lithium grease, wheel bearing grease, or other common lubricants to create a similar product.
Good old "3-in-1" oil, like Mom kept for lubing her Singer Zig-Zag machine, is a low viscosity petroleum product that is quite good for light lubrication and corrosion protection needs. But when put into a package stipulating it as "TOP QUALITY SUPER-DUPER GUN OIL" the price per ounce jumps by a factor of 5 or 10.
Tommy Bishop, highly skilled gunsmith of the 1950's to 1970's, strongly recommended Sperm Oil, harvested from sperm whales (back in the day when "SAVE THE WHALES" probably meant collecting the whole set). Watch and clock makers considered it best as well. Very expensive, even 50 years ago, and probably impossible to find at any price today.
You can buy the product you need, or you can buy the advertising hype. Your money, your choice.