lar45
08-15-2020, 03:13 PM
Well, I got a little shooting in today with a couple variations on comps on the 10.5" AR Pistol in 7.62x39.
I did all the shooting with TulAmmo 124gn JSP.
I used the Sound Meter 2020 AP on my T-Mobile Revvl 2 Plus phone. I put the phone on the bench about a foot away from my right ear.
Sitting Quietly at the bench the meter read 27dB, closing the bolt read 39dB
I started with the Tromix Linear Comp and got 47.5dB
Next I pulled the inner core out of the comp to simulate a blast can and got a reading of 47.7dB even though it was noticeably sharper and louder.
I pulled the Tromix comp off and shot it with no muzzle device for a reading of 50.4dB
I had a new AR Stoner Linear Comp from Midway and put it on next and got 49.9dB
Conclusions, A cel phone does not make a reliable sound meter to measure gun fire. The App does have the ability to calibrate the reading if you have a real dB meter to compare it to.
Just going off of the Mk-1 Ear-O-Meter...
The Tomix Linear comp was definitely quieter. Removing the core was a little louder, but still quieter than the AR Stoner Linear comp, and finally the loudest and sharpest was with no muzzle device installed.
I do have a standard Muzzle brake, but didn't put it on because I would have had to remove the forend to install it.
I did all the shooting with TulAmmo 124gn JSP.
I used the Sound Meter 2020 AP on my T-Mobile Revvl 2 Plus phone. I put the phone on the bench about a foot away from my right ear.
Sitting Quietly at the bench the meter read 27dB, closing the bolt read 39dB
I started with the Tromix Linear Comp and got 47.5dB
Next I pulled the inner core out of the comp to simulate a blast can and got a reading of 47.7dB even though it was noticeably sharper and louder.
I pulled the Tromix comp off and shot it with no muzzle device for a reading of 50.4dB
I had a new AR Stoner Linear Comp from Midway and put it on next and got 49.9dB
Conclusions, A cel phone does not make a reliable sound meter to measure gun fire. The App does have the ability to calibrate the reading if you have a real dB meter to compare it to.
Just going off of the Mk-1 Ear-O-Meter...
The Tomix Linear comp was definitely quieter. Removing the core was a little louder, but still quieter than the AR Stoner Linear comp, and finally the loudest and sharpest was with no muzzle device installed.
I do have a standard Muzzle brake, but didn't put it on because I would have had to remove the forend to install it.