USPTO: FN Silencers, QD Pistol System And More

The United States Patent and Trademark Office (USPTO) contains a searchable database of both patents and patent applications. While strolling through the system doing researching for a future TFB piece, I came across some interesting suppressor-related finds. Some of the applications are recent and others are a few years old, but either way, it is an interesting look into some big name players in the suppressor market and seeming lesser known individuals with unique ideas.

Mathematical Modeling Of The Nautilus Shell:

Silencers on the USPTO @TFB

Silencers on the USPTO @TFB

RA Brands, LLC = Remington Arms = Advanced Armament:

Embodiments of the present disclosure may include a silencer or noise suppressor having a rearward portion that may be coupled to the barrel of a firearm and a forward portion that can mate with the rearward portion such that a length of the rearward portion may at least partially overlap an exterior surface of the forward portion. The forward portion may include an interior chamber that can receive a baffle core having a core body made up of a series of spaced peripheral portions, and at least a portion of the baffle core may protrude from the interior chamber so as to be substantially sealed between the rearward and forward portions.


An Interesting CYCLIC Baffle Design:

Silencers on the USPTO @TFB

Silencers on the USPTO @TFB



Silencer patents @TFB


Silencer patents @TFB

FloDesign Inc. Baffle Design:


Silencer patents @TFB


A sound suppressor for a firearm with a high rate of fire, such as a machine gun, conceals the location of the firearm during heavy use by rapidly dissipating heat through a foamed carbon core. A sound suppressing baffle core is coaxially located within a tubular housing, having flared ends extending beyond the core. An inlet nozzle and exit place close the ends of the suppressor and are held in place with threaded collars. The terminal portions of the collars are beveled, as are the corresponding terminal portions of the nozzle and end plate, and are used to capture the flared portions of the ends of the tubular housing. Diagonally opposing recesses in the collars enable their removal with a spanner wrench, along with the other components for maintenance and replacement. The suppressor lasts longer and has a less visible heat signature used in sustained fire on a machine gun.


Silencer patents @TFB


Silencer patents @TFB

A Suppressor that uses a porous substrate to act as Baffle material.


Silencer patents @TFB

Baffle layout from SAKO in Finland.


Silencer patents @TFB

US Navy, Naval Surface warFare center (nswc), crane, IN:

A suppression system adapted to receive gas from a gas operated system and route the gas through a series of multiple chambers having baffles and/or valves as well as expansion chambers where the chambers are formed around a gas projectile barrel and adapted to route the gas in a first route along the barrel in a first direction then routing the gas along the barrel in a second direction. An embodiment of the invention couples the chambers to a gas block adapted to route gas between the chambers in the first and second route as well as receive gas from the projectile barrel and route it to the gas operated system. Methods of manufacturing and methods of use are also provided.


Silencer patents @TFB

An interesting look at a SureFire baffle stack


Silencer patents @TFB

Automatic Gas regulation in an AR platform (Remington/AAC):

A gas system includes a gas block having a gas port for directing propellant gases received from a gas port of a barrel of a firearm into the gas system to cycle an auto loading feature of the firearm. A spring-loaded plunger assembly positioned within the gas block includes a plunger component having a plurality of gas ports and a plunger cap at a forward end, wherein the position of the plunger component within the gas block automatically controls an amount of gas that is allowed to enter the gas system. Mounting a suppressor to the muzzle of the barrel depresses the plunger cap and drives it linearly rearward causing the plunger component to rotate to automatically restrict the volume of propellant gases directed into the gas system through a restricted flow gas port in the plunger component.


Silencer patents @TFB

Suppressor Covers:


Silencer patents @TFB

Coil Baffle Design:


Silencer patents @TFB

Jesse James in the USPTO:


Silencer patents @TFB


LE – Science – OSINT.
On a mission to make all of my guns as quiet as possible.
Twitter: @gunboxready
Instagram: @tfb_pete


  • NineWays

    This is relevant to my interests.

  • PK

    “Suppressor Covers” isn’t going to stand up, not a chance. Tom Bowers would like a word, as well, I’m sure…

    • Pete – TFB Writer

      Exactly what I was thinking.

    • Harry’s Holsters

      A patent is as good as how the deep the pockets protecting it are.

  • Anonymoose

    Maybe FN is trying to end their dependence on Gemtech, AAC, and SEI for 240 and 249 suppressors…

  • Paul Joly

    Porous substrate baffles, why not?

    • Spencerhut

      Better be easy to replace since they will clog up pretty fast.

      • Paul Joly

        If I remember correctly what I read some time ago, carbon fouling occur when there is a rapid decompression. If we reduce the decompression rate, will carbon just leave the system?

        • I think you mean rapid “depressurization” .

  • Harry’s Holsters

    The QD pistol can idea is cool. I can think of a couple ways to do it. Who knows if they’d work in reality but I don’t see why it couldn’t be done.

    I don’t know why someone hasn’t gone magpul and made an open source mounting pattern for the barrels.

  • Several of these “new” patents have been long known designs that would nullify the patent if challenged. The porous material one would be covered under the dated signs that used copper wool, eyelets, and other items that are porous. The coil baffle design looks to be springs fro the drawings used as spacers which has long ago been tried and was found wanting. As PK mentioned, the suppressor cover has been done before as well.

    The only ones that will make money off the previous mentioned patents are the lawyers that did the patents and the lawyers involved in a lawsuit to defend them.

    • Frankford Arsenal designed a porous aluminum suppressor for the M16A1, and submitted it for testing in 1968. It was withdrawn after one burst during full-auto testing.

      • George

        Yes, but Silicon Carbide, Stainless, and Inconel open cell foam porous materials are more hest tolerant.

  • Cymond


    Heh, yeah, probably about as effective as steel mesh shoved into a tube.