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They are both just as easy to suppress. It seems that 9mm with subsonic loads is quieter than .45 when both are running dry with similar suppressors. Prices are in the same range for both.
From the discussions that I've heard .45 is louder due to its larger cross section. I will let the class III dealers go into further detail, and probably correct me
If you are suppressing a Glock or weapon like it, most suppressors will need the addition of a LID, Linear Inertial Decoupler for the pistol to function properly. If it does not have this, cycling may be an issue.
There are at least two cans on the market that do not require the use of a LID type device, but most do. This should not be needed on a Sig.
Thanks Nox, very informative post.
Do you think there's any benefit (not just suppression benefit but also others) going with a USP Tactical .45 ($850-$950) versus a Glock 21 ($450 + $110 Threaded Barrel + $50 sights = $610)? That's enough of a price difference to cover the stamp right there.
Do the Lone Wolf barrels have any effect on accuracy? How about the suppressors themselves?
To the original question..........
If you use subsonic ammo with both then 9mm will 99% of the time be much quieter. The hole diameter is the issue. It just allows more gases to pass though faster. Not much you can do. Most 147gr 9mm is subsonic out of a barrel up to about 9" in length.
A LID type (Neison) device is generally needed on with pistols that have barrels that move or shift during the cycling of the gun. The device works by relieving the the weight of the suppressor from the rest of the barrel for an instant to allow inertia to build in the movement of the barrel. Kind of like if you were to pull a heavy object with a bungee cord quickly. Initially the object wouldn't slow you as you are pulling to expand the bungee, but it would slowly increase in actual pressure up to the point in which the bungee would get taught and the heavy object would start to move. At that point you have momentum helping you to start to move that object. Or for the rednecks here........ it's kinda like a tractor pull.
ETA: Does it cost more to suppress either? The main cost difference will be in obtaining a quality threaded barrel and sights tall enough to look over the suppressor. I would say a Glock would be cheaper. I have a G17 that has a Lone Wolf manufacturing barrel ($100 ish) and sights that cost me around $50.
Nice build, nice picture!
It's almost gun porn!
Joey,
I think we just need a range session and I can show you some of the differences.
I have quite a few cans and you can see for yourself which is better etc.
Consider me interested if you ever want to schedule a suppressed range session and you are willing to have another interested fellow in attendance...
I'd like to see/try some of these firsthand and learn a bit more before taking the plunge on such a purchase myself.