Foresight thread protector and suppressor

Hi guys

Is there anyone on here that's ever done anything like this ?

Attachment 82173

I'm wanting to suppress one of my rifles ( the last modern one that's not suppressed (excluding my 9.3 ) ) that I will still primarily use without the suppressor and would like to retain the functional front sight.

Suppressor will be over barrel and absolutely the lightest I can find that suites a big 6.5mm

The real issue with this arrangement is that I don't want the front sight to index on the fit between thread protector and barrel shoulder.
As this will ultimately change with time.

So there would need to be some kind of basic indexing system built into this.
Ideally no tools required as just something to loose.
Simplest solution if usually the best solution.

Then the next question is what is currently the very best lightweight suppressor available in nz excluding the titanium ones that are on another planet cost wise.