Went to the Texas Gun show today in San Antonio with hopes of adding a 45 caliber to the collection. Found a used G21. It's dirty and will need a good bath and cleaning. I haven't detail stripped one yet, but this one needs it. It has gunk in most of the interior crevices. Once I get is stripped down, what is the best way to really clean the inside? I'm wondering if when I get it stripped, and apart, will there be anything left internally to clean? There was a Glock guy there, and he installed the 3.5 connector for me. Trigger feels better. Forgot to mention it, but it does have adjustable sites. Not sure about them yet as they hang of the back of the slide by 1/4" or so. Kinda seems weird.