I picked up the Airlock ZG 6.5 from my SOT yesterday and tried it out at the range today.
BLUF: I think it is safe to say that it lives up to the hype. Everyone who heard it agreed that it was the quietest of the three cans I shot today. Several observers also noted that the ZG had a higher pitch than the other two.
Rifle: Tikka 6.5mm CM, 20” barrel
Ammo: S&B 140-grain FMJ (average MV 2585, slightly faster than the Hornady I use for hunting).
Suppressors: AB Raptor 8 w/ 3” reflex; US OG 6.5, Airlock ZG 6.5
Weather: 48 F
I did two sessions gathering the handful of folks at the range for each session. All of them had prior suppressor experience, none was familiar with any of the three cans I brought today.
I forgot to hit record on the first session. Second session is here (pardon the old guy with his Garand, I tried not to shoot at the same time as him, but you can hear him banging away at the end of the firing line). The camera was just behind my right shoulder. As you can hear at the beginning of the video, I don’t expect much from smartphone mics, but some folks asked for it.
Quotes not captured on video:
“It’s not as quiet as my Scythe Ti using .300 Blackout subs… but obviously that’s not a fair comparison.”
“All three are very quiet, but I have to give the edge to the second one [the ZG 6.5].”
“That second one [the ZG 6.5] has a much higher pitch, but it sounds quieter.”
My subjective impressions as shooter. The Raptor had the least felt recoil. The ZG had noticeably more thump. Of course, this is expected based upon relative weights. And none were at all unpleasant to shoot.
It did get noticeably hotter than the others. With the LS Wild cover, I could still unscrew it after five shots. I noticed slight mirage with the cover after the fifth shot. I also have an LS Wild cover on the OG 6.5.
I concur with the observers that the ZG was the quietest relative to the others, but all were very quiet.
In the future, I plan to rent some sound equipment and run a test where I don’t have M1 Garands in the background.
POI shift: The rifle was sighted in using different ammo (Hornady factory 140-grain ELDMs) and with the Raptor. This ammo was hitting about 0.5” higher with the Raptor. With the Airlock and OG, each was about 2” higher than that. The ZG 6.5 and OG 6.5 shot to the same POI.
If you have any questions, ask away.