Ok first off TECHNICALLY they would be illegal but it's just that airsoft grey area.
Second the silencer (not suppressor
) that drastically changed the sound of my JG 416. It was not a big change to the person who was doing the shooting, BUT for other people it did.
In outdoor games you can hear someone's AEG making a rapid fire popping sound when being fired (I LOVE that sound
) from all the way across the field, with my silencer on the 416 you couldn't hear that sound from anything over 1/4 the distance and even then it was muffled.