Since this has been a hot topic here recently I decided to launch this video. We had a chance to test out the SilencerCo Octane 9, 45, 45K and a 45 with the 9mm endcap on 300 Blackout. Results were good for a pistol silencer. Keep in mind that the barrel length was short so it made the numbers a little louder than a 16" gun. Also the Octane silencers are only rated for 300 Blackout Subsonic.