SIG Sauer Working on P320 with Integral Hold-Out Suppressor

A rendering of the capsule-based suppressor. (Photo: SIG/USPTO)

Rumor and the patent office have it that SIG Sauer is working on a new type of ultra-portable suppressor for duty pistols. SIG calls it the Integral Eccentric Firearm Silencer on the patent application, designed for use with the P320 series of pistols.

Unlike conventional suppressors, SIG’s suppressor is only good for a few shots before it wears out. The trade-off is extreme portability. This suppressor is only slightly larger than a pistol compensator and it can be holstered and carried all day, every day.

The idea is to give people like police officers and law enforcement a little extra ear protection should they ever get in a gunfight. This is not a suppressor for a day at the range.

Like early suppressors, the SIG design uses ablative capsules to mitigate noise. During use, the capsules break up and will then need replacing. The drawings appear to show a couple of conventional baffles and an expansion chamber as well, so it wouldn’t be a surprise if the suppressor still helps cut noise even with worn-out capsules.

What doesn’t appear in the drawings is some kind of recoil device or booster. With a device this small it’s possible that it just doesn’t need one. Conventional suppressors often weigh so much that they prevent tilting barrel-action recoil guns from cycling.

A cut-away drawing shows some interesting details. (Photo: SIG/USPTO)

This unit may be light enough to not hamper cycling. That may also make it a little more efficient for its size.

“It is great for police officers,” said Q engineer and patentee Ethan Lessard, formerly of SIG. “Like, you get two, three shots at hearing safe pressure levels, and it affects nothing else.”

See Also: SIG Sauer Bringing the Army’s M17 to the Commercial Market

Lessard explained that the capsules don’t degrade over time. “You assemble this, put it in your holster, and it lasts as long as the outside of the gel capsule lasts,” he said.

It will be interesting to see how SIG decides to go forward with this concept, if it turns out to be viable. Cost will definitely be a deciding factor if departments and agencies are going to adopt something like this for regular sworn officers.

We know SIG can make the P320 affordable, but the suppressor and its maintenance will have to be inexpensive as well.

Also, from the looks of the drawings, there doesn’t appear to be any need for this to be a SIG exclusive. While there could be a mechanical reason to pair it with a suppressor-specific P320, if there isn’t, then a lot of departments — and everyday gun owners — would be interested in something like this.

Would you be interested in a limited-use suppressor for everyday carry and home defense? Let us know what you think in the comments!

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About the author: Max Slowik is a writer with over a dozen years of experience and is a lifelong shooter. He has unwavering support for the Second Amendment and the human right to self-defense. His ambition is to follow Thomas Paine, as a journalist by profession and a propagandist by inclination.

{ 5 comments… add one }
  • Ted A August 12, 2018, 12:03 pm

    I like that idea, for limited use it would be perfect, but They should work on their trigger while they are at it. Worst Sig trigger I have ever tried

  • James Black August 10, 2018, 1:06 pm

    I want it to cut the decibel rate by half or the costs and experimental ballistic tampering on spec is just more phrenology.

  • HipV August 10, 2018, 11:43 am

    I would buy this type suppressor for my 320. While I realize it has limited use, it would shine in a car environment should you need to use your gun. Additionally, while 3 shots may seem useless (one has to evaluate the cost vs. use) it gives you the “opportunity” to install your earplugs (if you carry them – should be standard issue as in everyday carry) for subsequent followup shots. Results: you save your hearing.

  • tsh77769 August 8, 2018, 4:07 pm

    So, when I drop it in the woods and it fires, does it make a sound?

  • Mike V August 8, 2018, 4:02 pm

    Just two or three shots? Should be good for at least a mag I would think.

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