I got a couple of questions about my new Glock 21. According to the manual, it says to leave in the copper colored grease for long-term protection. However, it seems that I am getting a build-up of carbon, etc.. along the slide rail groove. Should I remove this grease or not? Also, I was taught in the army that CLP was good enough for cleaning the whole weapon (even as barrel solvent) and lubrication. Should I stick with CLP?
I would clean with CLP without worrying about the copper lube, whatever comes off in the process is o.k. Typically, after cleaning with a brush and CLP (or solvent, if need be) a few times the lube is all gone and that's just fine. I don't think they mean not to clean the carbon off in order to keep the copper lube.
I use CLP almost exclusively for cleaning and lube. I clean and lube my guns after every session, regardless of the number of rounds discharged, and hardly ever have use for the bore cleaners I have. In short, if CLP (I use Breakfree CLP) is adequate for cleaning, no need to use anything else, IMHO.