Indexing Moderator

If it's important to you, you could put an o-ring (try different thicknesses) at the base of the 1/2 x 20 Male thread. I'm not aware of "shims" to make logo show. I did the o-ring thing for a different reason & it didn't affect the alignment to the point of clipping. Personally I'm more concerned about quietness than aesthetics. 
 
Silent Thunder Ordnance sells exactly what you are looking for to index their moderators which btw are the best I have tried on my M3's. This guy used to design Suppressors for real guns and REALLY knows his stuff. His 21 part blog is the most informative thing I have ever read about sound suppression and worth a read. 

https://www.silentthunderordnance.com/air/moderator-timing-shims
 
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