Tuning Little holes on barrel shroud pp700sa

What is the story on the small holes on the top of the barrel shroud. It vents air when its fired so I guess a sort of air stripper??

I want to lessen the noise without moderator is this possible?

What will happen if I block the holes, would it affect accuracy will it increase FPS?

I would think that even if you had a moderator/silencer the holes defeat its purpose.

What are your thoughts.


 
Tape over the holes and see for yourself if it affects your accuracy or noise level. I have put a strip of foam inside the vented shroud on my Kratos to slow the air down that’s being vented. You can use the foam from a can of JSB pellets, cut into a one inch wide strip and long enough to fully wrap the barrel and place it just in front of the vents. It makes a considerably softer sound than without the foam on my Kratos. Just wrap the barrel with it and then install the shroud over it. Costs nothing to try it.