Well, it was bound to happen eventually; but, we finally made the mistake of shooting full-power .308 ammo through an AAC M4-2000 suppressor a few days ago.
I will admit that I’ve always been a bit curious about what the result of that combination would be – and we were fortunate enough to have both a sound meter & video running.
The first data point is that the sound reduction was pretty impressive – inline with other top-of-the-line .308 suppressors. In this case, we were getting results less than 135 dB – which really pushes home the fact that a tighter bore suppressor will typically perform better with less volume.
All suppressors use a bore that is slightly larger than the bullet to compensate for threads that aren’t 100% concentric. In this case, we were able to fire .308 through the suppressor without any type of strike in the suppressor – but that was just a lucky break.
An M4-2000 really can’t support the pressure of a .308. As the attached picture shows, the endcap bulged out a bit where the .308 bullet exited.
Anyway, as always, we’re here to make the mistakes so you won’t have to!
If you’re interested in how .308 performs through a suppressor that was meant to handle it – be sure to check out this video: