I am just swapping my AAS200 over to diopter sights to do some target shooting....

However I have notice how load it is without a moderator...
This causes me issue for garden practice as I used to shoot all hours very quietly.....
Can I:
Fix the front mount further back on the barrel (would need to file a small grove to local the fixing screw).
The have the usual UNF adapter on the end of the barrel.....

Is this likely to negatively affect the accuracy?

Any thoughts
Pete