To purchase this firearm, contact your local Daniel Defense Dealer.
The Daniel Defense DDM4ISR is our Integrally Suppressed Weapon System optimized for the .300 Blackout cartridge. Built around a 9”, Cold Hammer Forged barrel that is fluted along with a target crown and a standard pistol-length gas system, this versatile, high-performance rifle is the complete package, accurately delivering both subsonic and supersonic projectiles downrange with unrelenting reliability. Because the suppressor is an integral part of the barrel, this weapon system is ready for service right out of the box. There’s no attaching a suppressor and wondering if it’s mounted correctly and/or properly aligned. There’s no re-zeroing for suppressed vs. unsuppressed fire.
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 on the sides and bottom. 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. The new independently ambi GRIP-N-RIP Charging Handle accommodates left- and right-handed shooters and is engineered for suppressed fire, with anti-gas features that redirect gas flow upward and away from the face and operator.
This firearm is a regulated item by the National Firearms Act (NFA). Please check with your local and state municipalities for any further regulatory requirements. It is the buyer’s responsibility to make sure they comply with all NFA rules and applicable laws.
Materials & Construction
- LOWER RECEIVER: Mil-Spec with Enhanced Flared Magazine Well and Rear Receiver QD Swivel Attachment Point, Type III Hard Coat Anodized
- UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
- 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
- HANDGUARD: MFR XL 15.0, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized
- CHARGING HANDLE: GRIP-N-RIP Charging Handle, Body CNC Machined of 7075-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, Type III Hard Coat Anodized
- 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
- Made in the USA!
|Muzzle Thread||Permanently Attached Muzzle Device|
|Gas System||Pistol Length|
|Barrel Profile||S2W® [Strength-to-Weight]|
|Product Weight||7.57 lbs|
|Length||31 ½” – 34 ¾”|
|Magazine||Magpul PMAG 30 AR 300 B GEN M3|
|Case||Daniel Defense Full-Latch Impact Plastic Case|
|External Purchase URL||https://www.silencershop.com/daniel-defense-isr.html|
Fully integrated stainless steel suppressor is pinned and welded for fulltime suppressed fire and extends barrel length to NFA-required 16”
Cold-Hammer Forged Barrel
Intense hydraulic pressure process that forms the most accurate and longest-lasting barrels attainable
Flared Magazine Well
Widened and beveled magwell funnels magazines into place for the fastest, most secure reloads possible
Ambi Safety Selector
For right or left-handed shooters
Free Float Rail System
Proprietary 4- or 6-bolt attachment to the upper receiver allows the rail system to free float the barrel, which will ensure barrel harmonics are not affected during operation
Features a nonslip cheek weld, interchangeable butt pads, and an integral QD point
Integrated quick-disconnect points for the attachment of slings
Features KeyMod attachment system
Ergonomic wrist angle, integral trigger guard and nonslip grip for comfort and control in all conditions
very pleasedVery pleased with the rifle it took 15 months to get it approved for the NFA but now that I have it it is exceptionally quiet in his run a hundred percent reliable with S&B subsonic ammo and Hornady 190 grain sub-x ammo and had no problems I use the Lancer 300 black specific mags. I did switch out the pistol grip buttstock foregrip trigger and charging handle for anlwrc stock Magpul K2+ grip Geissele sde trigger and Geissele charging handle which just completely changes it so that it's a much nicer feeling rifle.100% happy I only wish I would have gotten it sooner. If you're on the fence about it I'd say it's definitely worth it don't let the reviews of the Gen 1 rifles hold you back from the Gen 2 it's nice and quiet and reliable.
Blown away by the quality of this rifleMy range time with my M4ISR has been limited to conjugal visits at the dealer while my tax stamp processes. As soon as you pick the rifle up, you notice a ton of details that just don't come across in the pictures online. It is meticulously built and finished, nothing is tier 2. The first time I tried the trigger, I second-guessed myself on whether I took the safety off - it is a creep-free solid wall followed by a crisp break, just awesome. The first thing I noticed in the live-fire was the absence of gas blowback. I've fired a number of other suppressed MSR platforms and the all had eye-burning gas blowback - not this one. I've only been able to shoot it indoors, but with 200gr subsonic rounds, it sounds similar to a paintball gun. It is the quietest I've shot so far. This is a top tier rifle!