[Azathoth]

What is not known is the truth behind what is listed in the parts of the video. Making a gun that silent is mindlessly simple if you are running a TM strength spring (~0.8j). Their are other aftermarket parts that are not really known such as cylinder heads with spring loaded shock buffers built into them (home made items see filairsoft, Japanese, and Chinese language forums).

Doing things such as swiss cheesing a piston is really not all that necessary now. maybe 6-10 years ago when material quality was awful in the polycarb and the other option was aluminum pistons that where very heavy. I wouldn't even think of swiss cheesing pistons now.

I've found that the faster the gun cycles the more 'quiet' it seems (i said seems not is more quiet). Also the tone that the gun makes will affect how 'loud' the gun will sound, which will affect how the sound carries.

In my mind guns go "BANG" even suppressed guns are very loud. Shooting subsonic rounds suppressed is still loud (as always some exceptions apply).