9mm D3-9SD: Integrally Suppressed AR

Once again, in the “if it’s new to me, it has to be new to someone else” catagory, Desert Design and Development offers an integrally suppressed 9mm AR carbine called the D3-9SD for sale in a variety of configurations. Similar to the iconic MP5-SD made by Heckler & Koch, the D3 features a ported barrel that is threaded at the chamber end of the barrel rather than the muzzle.

This configuration allows for the use of a variety of different ammunition; by bleeding off extra velocity, rounds exit the barrel at subsonic speeds, avoiding the extra crack from breaking the bound barrier. It also allows for a great deal of internal volume inside the suppressor. The end result should be a very quiet setup.

One major difference, however: the D3-9SD is a straight blow-back action rather than its HK counter part that utilizes a roller delayed action. Having never heard one in action, I’m willing to bet it’s still very quiet.

Details and specifications below.

Wait, I almost forgot, they offer .40 S&W, 10mm and .45ACP versions as well.


D3-SD9 9mm AR Description:

The D3-9SD, also known as the, “Ultimate Urban Carbine”, maintains the familiarity of the AR platform, the stealth of the H&K MP5-SD style suppressor, and utilizes the popular Glock 17/18/19 double stack 9MM pistol magazines.

The Glock Pistol is so popular with civilians, Law Enforcement, and government agencies. This carbine is designed to complement their existing Glock handguns and give them the tactical advantage of carrying only one caliber magazine and share it on both pistol and carbine. This allows quick transition from a sidearm to an extremely quiet and accurate suppressed carbine.

D3-SD9 Specifications:

  • Overall Length: 22-29″ depending on stock
  • Barrel/Suppressor Length: 13.5″ installed
  • Barrel: 6.75: ported, 4140 steel, 1:10 twist, parkerized
  • Serviceable Suppressor: not recommended
  • Enhanced hybrid bolt carrier
  • Standard charging handle
  • 9mm Deflector & short dust cover
  • 9″ Forend: choice of KeyMod or Quad-rail. 6160-T6 Anodized
  • Forged lower: 7075-T6, Hard Coat Anodized
  • Magpul K2 Grip
  • Magpul MOE mil-spec stock and 6-position buffer tube
  • One 30+ rnd magazine
  • Optics Ready
  • Semi-auto fire group
  • Full auto available with LE/Gov’t letter
  • Base Weight: approximately 7.0 lbs. depending on caliber and configuration
  • NFA Rules Apply

MSRP: Starting at $2,699

Pistol versions are also available.

Note: It should go without saying but, do NOT shoot this barrel without having the suppressor properly seated and installed. The escaping gasses from the ports can burn you.


Desert Design and Development on Facebook


LE – Science – OSINT.
On a mission to make all of my guns as quiet as possible.
Twitter: @gunboxready
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  • TheNotoriousIUD
    • Corwin Bos

      Honestly 10mm scares me a little bit in a straight blowback, but more power to them if they want to give it a shot. Would need some very heavy springing and heavy bolt to keep that round under control.

      Looks like they are using Aero M4E1 uppers with hand guard, but I wonder whos lowers they are using? Looks like a QC10?

      • TheNotoriousIUD

        Dont know, the pics are kinda crappy.
        Im interested in getting my hands on one to check out the innards.

        • Corwin Bos

          Pretty hard to screw that up to be honest. Just use something quality for the bolt, a nice heavy buffer, and the right spring and youre good to go.

          My 9mm AR runs CMMG bolt, KAK buffer, Wolf XP spring, QC10 lower, Aero upper, Green Mtn barrel. Works like a champ

          • TheNotoriousIUD

            Cool, post a pic.

          • Corwin Bos
          • TheNotoriousIUD

            Nice, dude.
            My next build is going to be a 9 or 10.

          • Corwin Bos

            Step next is a suppressor and SBR stamp. The barrel is 10.5″ on this one. Under the handguard I use a KAK flash can to bring it just flush to the end of the handguard. The Aero handguards are big enough to get the can down in there with no issues.

            Go 9mm, the ammo is cheap if you buy, easy to reload if you want to go that route. I run the same reloads in that pistol in the pic as I do the carbine with no issues.

          • TheNotoriousIUD

            Sounds sick.
            I want a PDW stock on mine. The proprietary BCG/buffer thing is a little worrisome but they look tight.
            I have a 9mm subgun so I thought id try something a little weird. Who knows if ill even get around to it.
            I need cheaper hobbies.

  • Henry Reed

    Well that Magpul grip stop is backwards….

    • KestrelBike

      It’s to contain my beast of a C-clamp.

    • Shankbone

      Whether or not the grip stop is backwards depends on the tier from which the operator is operating.

  • Disarmed in CA

    So many dangerous features, so little time to craft legislation to ban them. Oh what the heck, we’ll just ban by fiat. Constitution be dammed.. like Oroville

    • DT

      but it is so pretty… you can’t ban everything beautiful, that is no way to go through life.

  • USMC03Vet

    So many stamps I can barely see firearm.

  • Xtorin O’hern

    why do companies feel the need to port the barrels on these guns? why not leave the option to go supersonic if you need a little more range?? and even then your shooting super sonic weight bullets at subsonic speeds and if you do fire the heavier normally subsonic ammo your robbing yourself of velocity that the heavy weight stuff is already lacking.

    • Beardedrambler

      Some people only want the gun for suppressed use. This gives you the option of using cheaper ammo and still have the best suppression

      • FarmerB

        Yes, but then you wonder why in 10mm?

        • ShootCommEverywhere

          So you can bleed off all that silly excess velocity and make your expensive 10mm ammo fly as fast [slow] as your cheap .40S&W ammo!

    • jerry young

      I’d say the porting is how they integrally suppress it, the porting is at the end of the barrel that attaches to the receiver it has to be in order for the suppressor to work, if you need more range you’re going to want a little longer barrel and a tighter twist rate, this is made for closer distance not long range

  • Audie Bakerson

    Is this a one (zero after HPA) or two stamp gun?

    • jng1226

      Probably 2 stamps because the barrel is threaded and the suppressor is removable. Even if the suppressor makes 16″ in barrel length when attached to the barrel, it would need to be non-removable (pinned/welded, etc.) to comply with NFA rules.

  • lolwat

    What optic is that? It looks like a C-More, but not quite. Anyone?

    • jng1226

      Pretty sure that’s a C-More Railway version.

    • Kwong

      More like an OKO

  • jng1226

    Is that ‘Mericun money? I like the .40, .45 and 10mm options but damn, I’ve built a Palmetto State Armory AR9 for less than $500 just by shopping their weekly and weekend deal emails. That even includes a CMC Trigger. It even has last-round-bolt-hold-open that works perfectly with my ETS clear 31-round Glock mags. I can add anyone’s suppressor and still be less than half of what they’re asking.

  • lolwat

    I figured out who makes the optic. Its a company out of Czech, its called an OKO Red Dot.

  • disqus_PDmXLtTxJj

    Everything HK touches turned to gold.