Daniel Defense DDM4ISR .300 Blackout Rifle - Deep Woods

One stamp, non-SBR silence with this integrally suppressed rifle.

To say that we at Charlie's love suppressors is a massive understatement. From the ever popular Mk18 to the assortment of long range PRS rifles we carry, a good silencer is one of our favorite accessories. For the dedicated enthusiast, finding the perfect suppressor and host combo can be lots of fun. It can be a challenge to tune a suppressed rifle system. One of the ways to get the high performance can be to go with a dedicated combo. For example, some silencers are designed for specific guns like the B&T TP9 paired with an RBS. Another option for real optimization is an integrally suppressed system such as the classic MP5SD. Daniel Defense taps into a long history of integrally suppressed firearms to bring discerning shooters a purpose driven system.

The Daniel Defense DDM4ISR is an integrally suppressed .300 Blackout rifle that only requires the buyer to acquire a single tax stamp because the barrel/suppressor combination comes out to 16". The DDM4ISR is built on a pistol length direct impingement gas system due to its 9" barrel. The DDM4ISR removes all the complications usually associated with suppressor use like correct timing or re-zeroing optics for suppressed and unsuppressed fire. The baffle core can be easily removed for cleaning and general maintenance.

Integral suppressed weapons go back much further than many people think. Covert operations during the Second World War necessitated unconventional for the time weapons. Among them were suppressed STEN and Grease Guns, Welrod pistols, and the legendary DeLisle Carbine. Putting down the Axis powers helped pave the way for modern use of silencers in military operations. Until recently, most integral suppressors on the civilian market were found on .22 pistols or the occasional bolt action rifle. HK MP5SDs were out there but came with a hefty price tag. Now that we are in the golden age of silencers, several companies have brought integrals to the masses.

Features and Benefits:

• Cold Hammer Forged Barrel: Delivers unparalleled accuracy and longevity, a testament to Daniel Defense's manufacturing prowess.
• Pistol-Length Gas System: Needed for the short 9" barrel.
• Integral Silencer: Permanently attached silencer brings the barrel out to the non-NFA 16" limit and also allows Daniel Defense to tune the gas system from the factory.
• KeyMod Rail System: Large enough to cover the permanently attached silencer. Provides a comfortable grip and effective heat dispersion, essential for sustained use.
• Ergonomic Design: The well-designed grip and buttstock ensure comfort and control during operation.
• Cerakote Finish: Daniel Defense's Deep Woods Cerakote finish protects as well as adds an aesthetic touch.

The Daniel Defense DDM4 ISR Gen II .300 Blackout rifle is build around and for use with the .300 Blackout cartridge, itself designed for subsonic suppressed use, the ISR is a turn key system. No need to tune the gas system or fuss with mounts. The ISR is good to go right out of the box. Integral silencers eliminate the need for QD mounts which add length and weight. This allows that extra length and weight to be diverted to increasing silencer volume. The permanent nature of an integral also means no more cans walking off threads or forgetting to properly lock mounts. Additionally, integral gas systems can be tuned at the factory to help reduce blowback.

The Daniel Defense DDM4ISR uses the MFR XL fifteen inch modular handguard with a KeyMod attachment points and a full length top rail for the mounting of optics and NV/thermal devices. The pistol grip of DDM4V11 rifle is a proprietary Daniel Defense design with soft touch over molding and the 6-position buttstock features the same soft touch over molding at contact areas. Additionally the DDM4ISR ships with a Daniel Defense vertical grip for improved maneuverability and fire control.

The Daniel Defense ISR's silencer is permanently attached to the upper's 9" barrel and is tucked under the KeyMod handguard. Unlike many under rail setups, Daniel Defense has made sure to leave enough room to help promote airflow for cooling and to prevent burns from insufficient clearance. KeyMod also has an advantage of being able to still mount accessories without worrying about screws or t-nuts sticking in and contacting the silencer.  One of the great facts about a good .300 BLK rifle is that it likes a short barrel.  At Charlie's we really think that 10" is as short as you should go with a 5.56mm round, but the .300 BLK works well with shorter barrels.  Now, add a suppressor, and you have a smooth operating and quiet covert tactical rifle.

The DD manufactured cold hammer forged barrel is a staple of the Daniel Defense rifle. It's S2W, strength to weight, contour helps properly support the weight of the silencer while also taking longer to heat up. Chrome lining adds corrosion resistance and enhances barrel life. A properly made BCG ensures reliable function. Their furniture is ergonomic and the rubber panels offer a sure grip in wet conditions. And Daniel Defense's ambi charging handle is excellent for charging with either hand or getting around optic mounts.

But why buy an integral?

• One tax stamp - By having the silencer pinned and welded permanently in place, Daniel Defense achieves the shortest overall length that does not require an SBR tax stamp.
• Easier to travel - Since the rifle is not considered an SBR, there is no need to file interstate transport paperwork. This means you can pick it up and go for last minute trips.
• No tuning required - With a permanently attached silencer, Daniel Defense is able to ship the rifle with an optimized gas port straight from the factory. No need to mess with adjustable gas blocks.
• Never worry about mounts - Permanent mounting means never having a silencer come loose or walk off its mount. Alignment is also permanently set so improper mounting can't cause baffle strikes.

Technical Deep Dive

This is the second generation of the ISR. Differences from the first model include the KeyMod rail instead of the original proprietary mounting. The rail also covers more of the silencer giving the shooter more real estate to work with. In addition to being lighter, the second generation also includes Daniel Defense's in house furniture.

The DDM4 reflects the evolution of tactical rifles, build over a history of discovering what works and what is just bad design. DD is known for no-nonsense well designed rifles. Not just the flavor of the day. The heart of this rifle, its Cold Hammer Forged (CHF) barrel, is known for its precision and durability. This process results in a denser, more durable barrel, essential for consistent long-term performance.

The KeyMod rail system enhances the rifle's adaptability. This is table stakes for a well designed rifle, for sure. It allows for a myriad of customization options while ensuring the rifle remains lightweight and balanced. The DD rail design is not just about utility; it provides an ergonomic and secure grip, vital for precision handling in various shooting scenarios. It is stable and feels good in the shooters hands. The rail also offers sufficient stand off from the tucked silencer to allow cooling air flow and prevent accidental contact with the shooter's hand.

Daniel Defense ships the ISR with a Magpul .300 Blackout optimized PMAG for reliable feeding with heavy, fat subsonic ammunition.

The rifle's ambidextrous safety is a nod to the diverse needs of modern shooters. The safety selector and other controls are accessible for both left and right-handed users, making the DDM4 ISR a versatile choice for a wider range of shooters.

The ergonomic design of the Daniel Defense grip and buttstock is a culmination of thoughtful engineering. They provide enhanced comfort and control, which are crucial during prolonged use. This attention to detail in ergonomics underscores Daniel Defense's commitment to the shooter's experience.

The DDM4 ISR is a blend of advanced engineering, thoughtful ergonomics, and tactical versatility, making it an outstanding choice for both professional and recreational shooters.

GET A GRIP & LET IT RIP

Ambidextrous GRIP-N-RIP charging handles provide a secure grip and even more flexibility for right- and left-handed shooters. Plus, the handles are designed with an anti-gas feature to keep gas away from your face and provide a better shooting experience.

Specifications Table:

Buying and shipping through Charlie’s is easy, but there is some information you need to know. This item must ship to FFL holder. No civilian exceptions.

1) Check your state laws to make sure the federally regulated item you want to purchase is legal in your state.

2) Find your FFL… Have your dealer send us a copy of their FFL to Charlie’s (Make them earn their fee!!!)

3) Be patient! You should hear from our compliance department within 3-4 business days. If not, feel free to reach out for a status update.

That’s it! We try to make this process as simple as possible for our customers. Please click the “Buying a Firearm” tab at the top of this page for more information.

Note: check here --> for California firearms compliance processing. The process may be different due to state specific laws.

NOTE: The free shipping option does not apply to full rifles