"Silenced" .223 firing Extreme Shock full cycle subsonic ammo

The video is hard to hear due to all the background noise. Stay tuned for better videos. I am using the decibel meter on my phone, but again, all the background noise and people nearby tarnish the readings. This is a Bushmaster AR. The silencer is from Quick Silver Manufacturing (QSM) It is titanium and weighs less than 10 ounces. The first 3 rounds are normal supersonic wolf ammo. The next 3 rounds are extreme shock subsonic. Note that the extreme shock cycles the action properly, even though it is subsonic.