PWC
Member
I shoot M1's and 03's.... Is there a suppressor that will fit them in a manner like the grenade launcher? The barrels are not threaded and I won't have them threaded for a suppressor.
Suppressors
- Thread starter PWC
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Moved to NFA.
Theohazard
Member
You'd have to get something custom-made. Most silencers fit to a rifle with a threaded barrel, either directly to the threads or attached to a muzzle device that itself is threaded to the barrel. Sometimes the rifle's barrel isn't threaded, but it has a built-in purpose-made silencer attachment point (HK's tri-lug, for example).
You'd need to find a gunsmith who'd be willing to make an adapter that will reliably attach a silencer to your rifles with zero permanent modifications to the rifles. The problem is that such an attachment will be less precise that if the barrel was threaded, so I'll bet that most gunsmiths probably wouldn't want the liability of helping you potentially destroy your silencer. So you're probably going to have a hard time finding a gunsmith who is willing to make you something like that.
But I'm since I'm not a gunsmith, I recommend you talk to someone who is. Let's see what @MachIVshooter thinks.
You'd need to find a gunsmith who'd be willing to make an adapter that will reliably attach a silencer to your rifles with zero permanent modifications to the rifles. The problem is that such an attachment will be less precise that if the barrel was threaded, so I'll bet that most gunsmiths probably wouldn't want the liability of helping you potentially destroy your silencer. So you're probably going to have a hard time finding a gunsmith who is willing to make you something like that.
But I'm since I'm not a gunsmith, I recommend you talk to someone who is. Let's see what @MachIVshooter thinks.
AlexanderA
Member
The M1 barrel is threaded, for the gas cylinder lock. Those threads are used, for example, for the blank firing adapter, which replaces the gas cylinder lock. There's no reason why a suppressor could not be designed to mount using those threads, with a shoulder on which the gas cylinder plug screw could abut. I would imagine, though, that the market for such a suppressor would be limited.
Elkins45
Member
I’m guessing you could buy a second rifle and have it threaded for not much more than what it would cost to have some sort of adapter custom made.
This might be an option for the M1 Garand. 5/8x24 is a common thread pattern for .30 caliber suppressors.
https://www.ebay.com/itm/M1-Garand-...x24-Thread-All-Steel-Heavy-Duty-/272274705421
https://www.ebay.com/itm/M1-Garand-...x24-Thread-All-Steel-Heavy-Duty-/272274705421
edwardware
Member
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On an M1. . . that's going to play havoc with your gas port pressure unless the suppressor just disconnects the gas system. My op-rod weeps at the thought. . .
AlexanderA
Member
I wasn't aware that such an adapter existed. I wish that such a thing had been available back when I was doing WW2 reenacting, and the blank firing adapters we were using had a less than satisfactory method of attachment. This seems like a solid mounting for muzzle brakes, BFA's, and suppressors. The beauty is that no permanent alteration to the gun is required.
Good point. You'd have to use a late-type plug screw with the relief valve (used for launching rifle grenades), and then have a means of depressing the relief valve. Perhaps you could cut up a grenade launcher and use the stem portion with the bayonet lug clamp. (When suppressed, the rifle would not function semiautomatically.)
MachIVshooter
Member
Saw the tag, so I'll go ahead and weigh in!
Adapters can be made for pretty much anything but, depending on what it actually turns out to be, reliable alignment of the can and consistent POI are a big question mark. Most .30 cal suppressors are over bore size by enough that axial misalignment up to .003" per inch won't cause a baffle or end cap strike. That's .024" axial misalignment over an 8" can, which will typically have a through bore .050" to .060" over bullet diameter.
When threading muzzles, I indicate at two points on a rod that is aligned with the last 1.5" of bore. Some bores are badly banana shaped, but I can usually get within .0002" per inch axial alignment. Yes, that's two ten thousandths, or "tenths" in the industry. While it could be quite a bit looser without trouble, what this does is mitigate stacking tolerances, especially with the use of adapters, or when there's not much shoulder.
The problem with using any kind of adapter that squares on the OD of a barrel is that it likely won't be perfectly concentric and, more importantly, the axial alignment can be off by quite a bit. This is further compounded if said adapter isn't a snug fit, especially if it is secured by a means which doesn't apply even pressure, as in the adapter linked above. That's why they're calling it a flash hider adapter; it's almost certainly not going to be true enough for a can. To use an adapter like that for suppressors, you'd want to time it to where it's very tight once aligned, and then turn the shoulder with the barreled action in a lathe and properly indicated. It would then be dedicated to that particular rifle.
Same deal for any kind of adapter on the '03 or another rifle which wouldn't have the barrel itself threaded; they have to be mated to the specific gun and the shoulder upon which the suppressor seats trued to the bore axis.
Also, yes, the remarks about port pressure above are correct. Without doing something to compensate for the increased backpressure, your Garand would be itself to death running suppressed.
Theohazard
Member
I wonder if that would be precise enough to avoid baffle strikes. It looks like it’s designed for brakes, which don’t need to be as precisely-aligned as a silencer does.
Edit: I type too slowly and @MachIVshooter answered my question before I asked it. So yeah, it looks like using that adaptor for a silencer would be a bad idea.
Last edited:
AlexanderA
Member
Sounds like the news is not good for suppressing either an M1 or an '03 without permanent alteration.
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