The pirate arms KAC QD 168mm Silencer CCW is a high quality silencer with a 14MM CCW (counter clock wise) screw thread.
The silencer comes with a flashhider that is included, replace it with the original flashhider of your replica so that the silencer can be mounted on it.
The silencer clicks itself into place with a special system, which is useful if you get CQB (Close-quarters combat) so you can quickly remove it and get more mobility.
The inside of the silencer is filled with sound-damping foam.
make sure that the sound is minimally muffled, most of the sound comes from your engine and gearbox which is not muffled.
The flashhider has a 14mm CCW (counter clock wise) thread which is the most common thread.
If your replica does have a 14mm cw (clock wise) thread, you can buy a 14mm Adapter CW to CCW separately.