Quoted:
I got a better idea.
Get you an Otis cleaning kit and you wont need one. You also wont have to worry about scaring up your barrel trying to push a tight patch.
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Duuhhh, The bore guide "prevents" the condition ya described there James_Gang. It's designed to center your bore brush and jag, so the throat and bore are lined up and NO scarring occurs.
BTW, the Otis claim to fame is how easy it is to "pull" a tight patch. (about the only postive thing, from a bore cleaning perspective, I can see w/'em, YMMV)
The best way to rid your AR15 bore of copper fouling IMO is w/ a bore guide, a Dewey (or similar rod) and serious bore cleaner.
A chamber brush such as those sold by GPSS, (link above) also comes in very handy, for cleaning the lugs and while the solvent port RayVin is my choice, the Denny's model works well for those who don't know how to hold the bore guide while vigorously brushing the bore, (something someone with a Otis kit can never do).
Mike