Here is what I'm after.... 1/2x28 male back to 1/2x28 female Confusing yes ! Heres the deal ...I have a threaded suppressor that I swap around on several rifles , I want to screw in the adapter and leave it in the suppressor , this way I'm working the threads on the adapter when I swap back and forth and not damage the threads in the can should it try to gall or stick to the barrel threads ...hope that makes sense now ;-) somebody out there make such a thing or do I need to just have one made at machine shop ??