View Full Version : question for you suppressor guys...
For those of you experienced with suppressors - how well does one work on an M1 Carbine?
Started a thread in the NFA section, got no hits, so here it is.
For those of you experienced with suppressors - how well does one work on an M1 Carbine?
I'm not an actual "suppressor guy" but I am staying at a Holiday Inn as I type this.
Obviously, suppressors in general are going to be less effective on a semi-auto than something like a bolt action. I'm not familiar with 30 carbine ballistics but if the round is sub-sonic it should work pretty well. Rounds that are not subsonic will be louder due to the little sonic boom created by the bullet.
Have you tried Youtube to see if there is a video of someone shooting a suppressed M1 carbine?
Yeah, I didn't find anything on YouTube, that's the first place I looked. I figured there would surely be one there.
Hmm. I just looked too. No such luck. Odd. They have everything on YouTube.
GilpinGuy
04-29-2013, 21:35
Obviously, suppressors in general are going to be less effective on a semi-auto than something like a bolt action.
I'm not at a Holiday Inn Express, and I'm a suppressor newb, so why is this the case?
From the CMP forums:
http://forums.thecmp.org/showthread.php?t=89474
Silencer Talk:
http://www.silencertalk.com/forum/viewtopic.php?f=2&t=41746
Moving parts for one thing. Take one of your rifles and rack the bolt all they way back and let it go. That's a noise you won't get rid of with a suppressor. Also, and I may be way off on this one, but I imagine a bit of the gas that is "trapped" in the silencer will blow back out of the action just enough to make some noise as the action opens. Not sure if that is the best way to explain it.
For a good example, just check out a video of a 300 Blackout in an AR and the same caliber in a bolt action.
There are a ton of videos of suppressed M1As. Much of a difference?
GilpinGuy
04-29-2013, 21:49
Moving parts for one thing. Take one of your rifles and rack the bolt all they way back and let it go. That's a noise you won't get rid of with a suppressor. Also, and I may be way off on this one, but I imagine a bit of the gas that is "trapped" in the silencer will blow back out of the action just enough to make some noise as the action opens. Not sure if that is the best way to explain it.
For a good example, just check out a video of a 300 Blackout in an AR and the same caliber in a bolt action.
Makes sense. Thanks.
UncleDave
04-29-2013, 21:54
A bolt action .22 you can get so quiet that you can hear the firing pin hit. That being said, you can suppress auto rifles pretty quiet. I have never seen a .30 carbine suppressed before, but it should work fine.
There are a ton of videos of suppressed M1As. Much of a difference?
Yeah, big difference, but the 7.62x51 would be the bigger challenge than the .30 carbine.
Standard .30 carbine ball round--110 grains and a muzzle velocity of 1,990 ft/s giving it 967 ft·lbf (http://en.wikipedia.org/wiki/Foot-pound_(energy))
Standard 7.62x51 M80 ball round--147 grains and a muzzle velocity of 2,733 ft/s giving it 2,437 ft·lbf (http://en.wikipedia.org/wiki/Foot-pound_(energy))
Oh yeah, forgot about the caliber. Doh.
From the CMP forums:
http://forums.thecmp.org/showthread.php?t=89474
Silencer Talk:
http://www.silencertalk.com/forum/viewtopic.php?f=2&t=41746
Duh, that thread on the CMP forum is me, asking the same damn question as here! Can't remember what I do and where anymore.....
http://www.uzitalk.com/forums/showthread.php?36723-Idea-reproduction-of-this-integrally-suppressed-M1-Carbine
Interesting that Springfield had a sample of an integrally suppressed M1 Carbine. That thing looks really cool.
Great-Kazoo
04-29-2013, 23:28
Providing you have the threads cut concentric to the Bore of the bbl it works fine. The only issue can be front sight removed for enough threads [0.50] for the suppressor.
Other than that, is there any reason you feel the need to suppress a firearm, are they even legal to own?
it would be quieter than a 308 thats for sure and i shoot my 308 suppressed all the time, but as others said, semi autos don't suppress as well as bolt actions, for several reasons. it certainly isn't like the movies. still have the sonic boom or crack, it does negate a solid amount of the recoil and makes it more enjoyable for the people shootin next to you.
jim brings up a good point thought about attaching it. it could be an issue.
Great-Kazoo
04-29-2013, 23:57
it would be quieter than a 308 thats for sure and i shoot my 308 suppressed all the time, but as others said, semi autos don't suppress as well as bolt actions, for several reasons. it certainly isn't like the movies. still have the sonic boom or crack, it does negate a solid amount of the recoil and makes it more enjoyable for the people shootin next to you.
jim brings up a good point thought about attaching it. it could be an issue.
Install a red dot and remove or set back the front sight. I'm thinking of suppressing my 357 lever. The loads i do are like shooting a 22 now, imagine that unit suppressed.
The only reason I'm even thinking the thought is because I keep an M1 carbine ready for h/d use, and would only want to avoid deafening everyone in the house. I don't need or even want one for range use, can't justify the expenses and hoop-jumping. Just more of a curiosity, really, never heard of any suppressed M1 carbines.
Aloha_Shooter
04-30-2013, 08:28
Interesting thought ... why is it we insist on putting mufflers on cars and motorcycles and think a sound-suppressed helicopter ala Blue Thunder is ultra-cool but people freak out over silencers? If we had a healthy gun culture, sound suppression should be a normal design feature on guns, particularly hunting rifles or home defense weapons.
Interesting thought ... why is it we insist on putting mufflers on cars and motorcycles and think a sound-suppressed helicopter ala Blue Thunder is ultra-cool but people freak out over silencers? If we had a healthy gun culture, sound suppression should be a normal design feature on guns, particularly hunting rifles or home defense weapons.
Agreed. I can't see any logical reason for suppressors to be NFA items and heavily regulated. They're just accessories for cryin' out loud, and expensive ones too. That alone would keep a lot of people from wanting or buying one. And aren't they not only legal, but required in some countries so shooters and hunters don't disturb other people?
Do The Idiots In Charge really think people would go wild using suppressors to commit crimes and murders? Criminals and gangbangers are going to go to the expenses of buying them and having them fitted? Really? Seems to me they'd be quite beneficial for many reasons, and they're damn sure not "dangerous". Loud muzzle reports are far more dangerous than quiet reports.
Let's take something that's good and beneficial, that also benefits the comfort of others, and make it too much of an expensive PITA for people to utilize and enjoy. But what do I know.
Great-Kazoo
04-30-2013, 10:17
The only reason I'm even thinking the thought is because I keep an M1 carbine ready for h/d use, and would only want to avoid deafening everyone in the house. I don't need or even want one for range use, can't justify the expenses and hoop-jumping. Just more of a curiosity, really, never heard of any suppressed M1 carbines.
Unless they are in the same room or very close "deafening them: is not an issue. Between the Adrenaline Rush and Tunnel Vision hearing loss is at the bottom of the list.
Id be more concerned about a cell phone and flash light next you your HD gun than a suppressor.
PLUS, to be effective you should have a SBR unit suppressed. Swinging a 16" bbl and an additional 5+ inches of suppressor makes for real tight swings. Tape a 6" ruler to your carbine and do some room clearing.
woodwaster
05-21-2013, 17:03
One problem with suppressing the M1 Carbine is that the barrel isn't large enough to cut a thread that will mount most .30 suppressors. For 5/8x24 thread (the most common) you'll need .725" of barrel diameter. If you mic your barrel, I think you'll find it's too "skinny". Maybe that's why the examples out there are integrally suppressed?
Skullworks
06-08-2013, 00:06
Sorry - The barrel size is a totally lame excuse.
Someone who is going to build a custom 30 cal can for a M1 carbine can just as easily build a proper mount. I'm betting a good HD 9mm can would work well - and a can for a Colt M16/9mm uses 1/2-36 threads. Barrel still too small, go to 12mm x1 and make a Internal / external threaded bushing adaptor... Its not Brain surgery.
Problem is the 30 carb round - all most all factory ammo will be super sonic. You can hand load slugs for a 30-30 about 140-150gr down loaded to be sub-sonic - and at that point you have a rifle that is shooting ammo with the same mass/velocity as over the counter 9mmx19 (Para, Luger, et. all ad nausium) sub sonic 147gr loads, but at about 3x the cost. If the can is user serviceable ( I will NEVER buy another factory sealed can!) You could cast up some 150gr flat points and load with Unique and have a dirt cheap plinking load that will not stress the brass much ( more reloads! ) - But Again - that would be a dirty load - your can would need a full tear down and proper cleaning about each 300 rounds.
Eh, I didn't think about the supersonic aspect. Just a pipe dream anyway. Thanks for the input guys!
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