DDM4ISR: The New Integrally Suppressed Rifle From Daniel Defense

As a lover of all things quiet, I realize the significance of .300BLK. A heavy, subsonic round that can be easily adopted into the most popular semiautomatic rifle system in the country, if not the world? Awesome. However, I have yet to find an application for .300BLK that works for me. Well, the new Daniel Defense DDM4ISR is pushing me ever closer to the dark side.


From Daniel Defense’s product page:

The DDM4ISR’s integral suppressor extends the barrel to an NFA-required 16 inches in length, so this platform is not classified as a Short Barreled Rifle (SBR) and therefore only requires a single tax stamp (for the suppressor). The suppressor’s lightweight outer tube is constructed of durable, heat-resistant metal alloys and coated with a protective high-temperature Cerakote-C finish, which is able of withstanding extreme temperatures and harsh environments. The suppressor is also user-serviceable, so its baffle core can be easily removed for periodic cleaning in order to maintain peak performance.

The DDM4ISR comes standard with Daniel Defense’s MFR XL 15.0 modular handguard, which features a continuous 1913 Picatinny rail on its top, for the mounting of iron sights or optics, and Keymod attachment points at the 3, 6, and 9 o’clock positions. This longer, multi-functional handguard, in conjunction with a Daniel Defense Buttstock and Pistol Grip, make the DDM4ISR as ergonomic and maneuverable as it is versatile. A resilient, attractive Mil Spec + Cerakote finish not only protects this weapon system from the elements, it also adds to its overall aesthetics—so while you’re sending rounds down range; you’ll also turn a few heads.


  • UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps
  • LOWER RECEIVER: Mil-Spec with Enhanced Flared Magazine Well and Rear Receiver QD Swivel Attachment Point
  • UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum
  • BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:8, 9″ S2W Profile, Chrome Lined, and Mil-Spec Heavy Phosphate Coated
  • INTEGRATED SUPPRESSOR: All Stainless Steel Construction, 17-4PH Monolithic Baffle, High-temp Cerakote-C Finish, Pinned and Welded Assembly.
  • GAS SYSTEM: Daniel Defense ISR Integrated Gas Block, Pistol Length, Direct Impingement
  • BOLT CARRIER GROUP: Mil-Spec MP Tested, Properly Staked Gas Key
  • BUFFER: H Buffer
  • SIGHTS: Sold Separately
  • RECEIVER EXTENSION: 6 Position Mil-Spec 7075-T6 Aluminum
  • BUTTSTOCK: Daniel Defense Buttstock, Glass Filled Polymer with Soft Touch Overmolding
  • PISTOL GRIP: Daniel Defense Pistol Grip, Glass Filled Polymer with Soft Touch Overmolding
  • GRIP: Daniel Defense Vertical Grip, Glass Filled Polymer with Soft Touch Overmolding
  • FINISH: Mil Spec + Cerakote
  • Made in the USA!

If you are interested in the DDM4ISR, I can’t think of a better time to support Daniel Defense.

Daniel Defense – https://danieldefense.com/contacts/
101 Warfighter Way
Black Creek, GA 31308
Phone (866) 554-GUNS (4867)
Fax (912)-851-3248
CAGE Code 3E3E2


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


  • Does the suppressor come off? How do you clean it?

    • Joe

      Apart rather than off. External tube is fixed for length requirements, internals come out for maintenance. I assume.

    • Anonymoose

      It’s pinned to make the “barrel” 16″.

    • Jwedel1231

      I would also like to know how one goes about servicing the suppressor, though I highly doubt it comes off. Maybe they are claiming it is service free, a la the Sig Sauer silencers?

    • J.K.

      Monolithic baffles are either pinned to the barrel or is part of the barrel. The tube slides over and screws on.

    • hking

      Many rifle cans are not user serviceable, the high pressure of the expanding gasses should prevent the buildup of too much carbon. See most of the Surefire cans, AAC, etc.

      For shooting subsonics it might need to be serviceable, in which case the front cap could unscrew and baffle stack be removed out the front. The outer tube stays affixed to the barrel keeping the 16″ length.

  • $1,500 rifle + $800 suppressor = (MSRP) $3,050

    • JumpIf NotZero

      This was my issue with it. Every time I tried to justify it even at dealer pricing, I couldn’t get around how much cheaper it is to just SBR a 9″ 300blk AR, and get a good can.

      I couldn’t make it work at wholesale, so retail isn’t even close.

      • DrewN

        And frankly, a 9″ is way more desirable.

        • Blake

          Uh this gun has a 9″ barrel, and if you plan on adding a can that’s going to make this rifle shorter than a standard AR w/ 9″ barrel + can. Still would never buy it, but just figured I would throw that in there.

  • Joshua Knott

    Hey Pete, by curiosity has T.F.B ever published a story on the original honey badgers aka ASVal ? Would be awesome to see the comparison between the .300blackout vs 9x39mm .

    • Pete – TFB Writer

      Thanks for the idea. I’ll do a search.

    • pbla4024

      Val or Vintorez?

      • Joshua Knott

        i thought they were pretty close in parts, just the VAL was newer?

    • Sermon 7.62

      300 Blackout is more like 7.62×39
      Same size, subsonic rounds, almost the same parameters. US in fact imitated and adopted the Russian round, but people are acting as if it’s not like that.

      • Joshua Knott

        you’re right with caliber comparison, but that wasnt the purpose of the statement, .300 blk was designed from forethought to be primarily a subsonic round, the max you can get out of that case for supersonic is around 2200-2300 (100-110 gr fodder ) I mean Privi ammo is hot and runs around 2500 fps 123 gr. I will still always prefer the larger case dimensions of the combloc round rather than the necked up .223. i digress though, the AS VAL like the blackout was designed as a intermediate cartridge which primary use was subsonic loads and ranges under 400 meters. The reason they actually necked up the 7.62 to 9×39 from what ive read was armor penetration capabilities. And your correct with them wanting 30 cal, but who wouldnt 😉

        • Sermon 7.62

          As I see it, 300 Blackout is a clone of 7.62×39 and its purpose is the same: to be a round, that is capable of a lot of things, such as the use of subsonic and armor-piercing rounds as a supplement to a regular FMJ. Is it not the main marketing motto of the Blackout? “Just replace the mag, and…”

          Speaking of the 9×39 caliber, it is subsonic and nothing else, and is a more accurate round than the subsonic 7.62×39, i.e 57-N-231U that shoots a 195 gr bullet but is not accurate enough to be used as a sniper round. So the 245 gr bullet SP-6 round was designed, for a suppressed sniper rifle that the Spetsnaz requested.

          Better armor penetration requirement also was the reason for that.

  • Rousso

    The ugliest rifle I’ve ever seen

  • Harry’s Holsters

    I’d love to see this with a MLok hand guard. If I had my trust written up and 3k lying around this might be my first purchase. Just a sexy looking gun!

    • Pete – TFB Writer

      MLOK was my first thought as well.

    • The_manBEar

      #teamkeymod 🙂

  • David Harmon

    I like it.

  • spike1984

    The integral silencer is used on the Colt CAR-15 Commando (the Vietnam predecessor of the ultra-compacts like the Olympic Arms OA-93, Kel-Tec PLR, and Rocky Mountain Arms Patriot) to make it compliant with gun laws by permanently fusing it to the barrel.