No comment on how it works on guns, I think you know more about that subject than I ever will.

I can comment on using it in modern engines. It is a Teflon (PTFE) based additive. Essentially a motor oil with solid particles of Teflon held in suspension. When you put it in an engine the Teflon knows to bond with the wear surfaces, while not clogging up the oil filter or any small passages (how it knows that, I don't know). Then it stays on those wear surfaces even when the oil is changed. Smart stuff.

Dupont, the makers of Teflon, have publicly said that their product has no benefit inside an engine, and tried to halt sales of these products. The trouble is, there are about 50 different PTFE oil additive products available, although those brands are produced by a much smaller number of blenders, and they just buy their PTFE offshore.

I lump all of the PTFE additives together, I don't think there is any difference between them. NASA tested them and found no benefit, but some negatives. The US Military tested them and decided that it was not acceptable in any of their engines.

I wouldn't let it anywhere near my engine, but that is just me.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue