Rebel Silencers SOS-556 Modular Rifle Can

Rebel Silencers out of El Paso, Texas is introducing a new model of rifle suppressor that can be disassembled for cleaning. Dubbed the SOS-556, each baffle is a threaded section of the silencer, eliminating the need for an outer tube. The pieces are also consecutively numbered to ensure that the SOS is reassembled in the correct order.

Writer’s Note: Rebel Silencers advertises on TFB, however, just as always, this is not a paid or sponsored article.

Tubeless suppressors aren’t new: Sig Sauer, SilencerCo as well a few European manufacturers build silencers without traditional outer tubes. However, this is the first modern design I have seen with multiple threaded sections accessible to the end user. It’s definitely interesting.

However, I do have my questions and concerns:

  • For rifle suppressors, disassembly for cleaning is usually a low priority requirement.
  • One concern would be that the threaded sections could ‘walk’ or loosen while shooting, creating the potential for damage to the baffles.
  • The heat imposed on a rifle suppressor is extreme – how will these threaded joints hold up to sustained fire?
  • The baffle design appears to be fairly shallow (flat) for suppressing supersonic rifle rounds. Usually steeper cones are a better choice.
  • The extra material around the threads for each section could unnecessarily increase weight.
  • Can two or three of the sections be left out of the stack, creating a swappable modular K-sized configuration. Edit: Apparently the answer is yes.

Now, having said all that, the $299 price tag has my attention. I’m really tempted to give one a try just to see how well it performs. And if it wasn’t for the yearlong ATF wait, I would probably pull the trigger.

Rebel Silencers S.O.S. @ TFB

Rebel Silencers S.O.S. @ TFB

From the Rebel Silencers website:

The SOS-556 is a beast. It’s a highly functional, modular, user serviceable, and effective multi-caliber capable suppressor. We use nothing but premium materials in its construction. The baffle assembly can be broken down easily for cleaning, and replacement parts are readily available. The SOS–556 is a workhorse through and through that is built to last a lifetime.

  • dB reduction on 16″ AR-15: 33 dB reduction (Hearing Safe)
  • Barrel Length: 10″ Min length barrel for 5.56 (SBR)
  • Length: 8″
  • Diameter: 1.5″ (just under)
  • Weight: 21 oz
  • Threading: 1/2 x 28 TPI
  • Main Caliber: 5.56/.223
  • Other Compatible Calibers: .22LR, .22Mag, .17HMR, 5.7×28
  • Weapon Types: Rifle, Pistol
  • Tube: Tubeless (No tube for this beast)
  • Material: 100% Hardened 17-4 Stainless Steel
  • Finish: High Temp Cerakote
  • POI Shift: Minimal

As I have said many times in the past, it’s great to see silencer manufacturers innovate and bring new products to consumers. The more choices that come into the market the more that the “hearing protection industry” will continue to strengthen.


Rebel Silencers –


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


  • BattleshipGrey

    Whoa, I did not expect to see that price tag. Valid concerns above, but as long as those don’t actually come into play, maybe I’ll be able to afford a manufactured suppressor after all.

    • thedonn007

      Yes, the price is lower than I was expecting as well. I have seen some low cost 5.56 suppressors for around the same price, but those do not take apart. You could form 1 a take apart 5.56 suppressor for the same price though.

    • Pete – TFB Writer

      For a first 5.56 suppressor, I’d look at the direct thread options from Innovative Arms. Inexpensive performers. $400ish.

      • thedonn007

        I would get a .30 cal can instead.

        • Pete – TFB Writer

          For a QD option, I agree. For an affordable direct thread, you’ll need a thread adapter which I don’t care for.

  • thedonn007

    Without wrench flats on each section, I imagine this to be a PITA to take apart after a long range session. I expected it to weigh more, but you are eliminating the outer tube.

    • TechnoTriticale

      My first thought on seeing this product was the mechanical engineering issue of “tolerance stacking”. Unless the bore holes are generously over-sized, the elements need to be made to very precise concentricity and axial tolerance. The threads also need to be quite snug, both to assure axial alignment and avoid working loose in use. Even with flats, I wonder if casual wrenching could end up in misalignment.

      • Pete – TFB Writer

        Similar concerns here.

      • Dr. Longfellow Buchenrad

        Assuming that the end that attaches to the barrel gets hotter (I dont own or have experience with suppressors so this is just an assumption) the female end will expand slightly more due to heat which may aid in disassembly while hot. However if that is true it would also increase its tendency it to back out while being fired. I assume this has been considered by the company and it is either negligible or appropriate measures have been taken, but you cant be sure.

    • RA

      Even an agressive machined knurled finish would help. As far as heat loosening, i would think the type of thread would be important. Self locking type?

  • Andy Hills

    I really like the design and price point, your concerns are valid though, but, i would image they have done plently of testing…. lifetime warrenty on these? If so what do you have to lose? I dont think wrench flats are needed but a couple of strap wrenches would be a good idea!! Someone buy one, run it hard and report back!!

  • junyo

    For the price, onsidering buying this as a .22 can that can size up to shoot .223 occasionally rather than as an actual .223 can.

    Can two or three of the sections be left out of the stack, creating a swappable modular K-sized configuration?
    Didn’t he say in the video you could take it down to 1 or 2 baffles for .22?

    Dat year wait tho.

    • Pete – TFB Writer

      Thanks. I missed that.

  • Jason Houle

    I would like to see them do the test by removing one baffle at a time. Also I would like to see them take that cheap red dot off and not have them Magpul BUIS on backwards.

  • wetcorps

    Why did they put holes in the center? It’s useless for trapping solvents now.

    • Pete – TFB Writer

      Well done.

  • iksnilol

    Low cost + using a well proven concept = I like it. Finally y’all over the pond can also get a somewhat handy can.

    • Pete – TFB Writer

      I’m not going to down vote you, but I don’t know how to talk to you anymore.

      • iksnilol

        Well, it is low cost (300 USD doesn’t sound expensive for a suppressor). And the multiple threaded section design has been proven to work.

        C’mon, you gotta admit that having 8 inches hanging at the end of your rifle is a teensy bit cumbersome. It’s nice to be able to shorten that when it is needed (IE for nightstand use or hunting).

        • Pete – TFB Writer

          First, although I like the idea, but it’s far from a proven design.

          Second, shorten a nightstand pistol? Sure. Rifle? Three inches isn’t going to help much.

          You want short and light, check out Delta P Designs. The future of silencers.

          (TFB Review and Spotlight coming soon to a browser near you.)

          • iksnilol

            It’s a proven design, used for decades in Europe. Now if Rebel Silencer’s CQ is up to it, I don’t know.

            And I dunno about you, but I’d rather have 20 inches instead of 24 of barrel + suppressor combo (presuming regular ‘ole AR-15).

            Delta P? Their Brevis design? ‘Ole news over the pond, baby. Ase Utra has been doing short, stubby suppressors for a while. Only difference is that they use welds. A-tec is in that game as well.

            I do like the baffles in your systems tho, but the length is not something I’d envy.

          • Pete – TFB Writer

            You know of another 4-5oz 3D printed Titanium 5.56 4″ suppressor that can ride on a 10″ barrel?

            That is not old news anywhere.

            Are-Utra has five piece screw together rifle cans with a proven track record?

          • iksnilol

            A short FA rated can is an old concept. That Delta P uses an needlessly expensive manufacturing technique which gives you less flexibility is their concern.

          • Pete – TFB Writer

            See here’s where I’m not sure you know what your are talking about. Or you are trolling me. Short cans are new But…

            A 4oz 4″ 5.56 can? That is not an old concept.

            “Needlessly expensive”. Based on what? You don’t even have a point of reference to base your argument.

          • iksnilol

            It’s an old concept: a short, non-cumbersome can that can be issued on a general basis without detriment.
            It’s new materials and manufacturing: titanium and 3d printing

            needlessly expensive because a can that expensive won’t be a general issue item, whilst they market it as a general issue do all can to replace flash hiders (basically improved flash hider).

            It costs more than twice the rifle it is intended to be put on. So yeah, thtat’s what I base my argument on.

          • iksnilol

            Don’t get me wrong, it’s cool and I’d like one but… eh.

        • Pete – TFB Writer

          Also, the US market is full of quality options.

          • iksnilol

            Nobody is disputing US quality here. I just find the designs lacking in some respects.

          • RocketScientist

            Its largely due to our stupid stupid laws. When you have to wait a year and spend $200 bucks every time you want to transfer a silencer, it basically eliminates the used market, and makes “affordable” designs pretty pointless (even a $100 silencer still costs $300 bucks and a long-ass wait). As a result, most people who decide to buy one end up getting one that has the most capability, most durability, highest quality etc etc etc. As a result our market is flooded with expensive very-high-quality designs built very very well, and has almost nothing at the bottom end. You can see it in this post, there are several comments already saying “looks like a neat idea, if it weren’t for the $200 tax stamp and a year wait I’d buy one just to check it out” or some variation thereof.

          • iksnilol

            True. I guess people just take what they know will work well enough instead of going for something different (IE modular suppressors or reflex suppressors).

            You got high quality going though.

  • Dr. Longfellow Buchenrad

    If they made one of these that was a QD or took adapters for different thread patterns you could just have one stamp and have different baffle sets for different calibers

    • Pete – TFB Writer

      I wish the law worked this way. No “spare parts” allowed.

      • Dr. Longfellow Buchenrad

        I was unaware of that. Thanks for the tip.

        • Pete – TFB Writer

          I wish I was wrong.

        • Cymond

          No spare baffles, but using interchangeable mounts is a common industry practice. A lot of people buy 30 caliber cans to run on both 30-cal and 223 guns.

          • JumpIf NotZero

            True; with the exception of all the designs now that have spare battles between their short and long configurations.

  • JumpIf NotZero

    Sweet! Can’t wait to see that blown apart dramatically in an ARFCOM thread.

  • I love the concept… but I share the same concerns mentioned in the article.
    Also… Wouldn’t each separate module section be it’s own suppressor? So each unit would require it’s own Form 4 and tax stamp?

    • BillC

      Sigh. No. It’s the same concept as the SiCo shotgun suppressor. It ships together full length with all the pieces, so it’s good.

  • Why do the .556 before the 300 BO compatible one?