AR15.Com Archives
 .30 carbine suppressor?
thecreeper23  [Team Member]
9/3/2010 3:23:55 PM
OK, I know little or nothing about suppressors and couldn't find anything using the search function. So here goes:

Is there a readily available suppressor that would work on a .30 carbine? Obviously I'd need a .30 cal suppressor, but the ads for them talk about 7.62 NATO, .300 Win Mag, etc. How would these suppressors work on a cartridge with less power than a .308?

Thanks!
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GarrettJ  [Team Member]
9/3/2010 3:28:18 PM
Any can rated for .308 will be just fine with a .30 Carbine. It will be heavier than you necessarily need for that caliber, but should work just great.
thecreeper23  [Team Member]
9/3/2010 6:49:04 PM
Thank you!
Waveform  [Team Member]
9/3/2010 7:03:45 PM
How long is your barrel? 16"? I'd use a 9mm silencer. SAAMI max pressure for the 30 carbine is 40,000 psi - not much higher than 9mm, and at 16" the exit pressure will be around 4,000psi according to quickload.
thecreeper23  [Team Member]
9/3/2010 8:31:34 PM
But 9mm is .38 cal, right? How would a .38 cal. suppressor work with a .30 cal projectile?
Waveform  [Team Member]
9/3/2010 8:39:04 PM
How would a bigger hole to fly through adversely affect operation?
TheSpaniard  [Member]
9/3/2010 8:47:26 PM
Originally Posted By Waveform:
How long is your barrel? 16"? I'd use a 9mm silencer. SAAMI max pressure for the 30 carbine is 40,000 psi - not much higher than 9mm, and at 16" the exit pressure will be around 4,000psi according to quickload.


Matters not the pressure in the chamber. Rather, what matters is the gas volume over time at the muzzle. This is a function of powder charge, powder type, and barrel length.
Waveform  [Team Member]
9/3/2010 9:13:58 PM

Originally Posted By TheSpaniard:
Originally Posted By Waveform:
How long is your barrel? 16"? I'd use a 9mm silencer. SAAMI max pressure for the 30 carbine is 40,000 psi - not much higher than 9mm, and at 16" the exit pressure will be around 4,000psi according to quickload.


Matters not the pressure in the chamber. Rather, what matters is the gas volume over time at the muzzle. This is a function of powder charge, powder type, and barrel length.

4000 psi is average exit pressure for 9mm. Volume isn't significantly more.
thecreeper23  [Team Member]
9/3/2010 10:09:00 PM
Originally Posted By Waveform:
How would a bigger hole to fly through adversely affect operation?


Well, I'm not sure. But since they sell them "caliber specific" it seemed like you would just buy the right one for your caliber. If a 9mm suppressor would work, then that's great because they seem to be somewhat less expensive than the .30 cal suppressors.
frog5215  [Member]
9/3/2010 10:50:46 PM
The lesser expense relates to less volume/pressure to control.
Using a bigger hole (9MM on .30 cal gun) will be marginally less efficient than caliber specific, but lighter, cheaper.
Waveform  [Team Member]
9/3/2010 11:34:14 PM

Originally Posted By thecreeper23:
Originally Posted By Waveform:
How would a bigger hole to fly through adversely affect operation?


Well, I'm not sure. But since they sell them "caliber specific" it seemed like you would just buy the right one for your caliber. If a 9mm suppressor would work, then that's great because they seem to be somewhat less expensive than the .30 cal suppressors.

M1 carbines are light and handy, and putting a 20-30oz rifle can on there is going to ruin that. An Evo 9 is 10oz and has a stainless blast baffle for durability. You could call AAC and ask about putting it on the Carbine. I know Titsworth shot a variety of 9mm silencers on a 357Mag rifle and got good results.
viper5243  [Team Member]
9/3/2010 11:54:05 PM
Ask the suppressor manufacturer what their can will handle.

I was using a 9mm can for 7.62x25 Tokarev and it was fine for a few hundred rounds. The the piston snapped and the can few down range. The company replaced it but said to use their .308 can unstead
thecreeper23  [Team Member]
9/4/2010 11:56:30 AM
So AAC makes this 10 oz. suppressor? That's who I should call?
Ranb  [Member]
9/4/2010 12:23:11 PM
I bought a Universal M1 carbine but I didn't want to make a new silencer for it, so I adapted the M-1 barrel ( I set back the front sight) to use my 300 whisper can that telescopes over the barrel 6 inches. The added one pound is not very noticable, but the noise reduction certainly is.



Ranb
torozmaster  [Member]
9/4/2010 1:22:56 PM
Talk to James Degroat about his 300 Whisper can. It should work for you. It is a light weight can.
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