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Daniel Defense DDM4ISR Daniel Defense DDM4ISR AR Optics Daniel Defense DDM4ISR Range Shooting
Daniel Defense DDM4ISR Daniel Defense DDM4ISR AR Optics Daniel Defense DDM4ISR Range Shooting
  • Integral suppressor
  • Nice low-angle grip
  • .300 BLK chambering
  • Grip angle takes some getting used to
  • .300 BLK feels slower than 5.56
Editor’s Note:

“The DDM4ISR is a .300 BLK integrally suppressed rifle from Daniel Defense. It sports a 9 inch cold-hammer-forged barrel with an overall length of 16-inches. This gun features a Keymod handguard and handles just about as smoothly in a shoot house as it does out on the range. We had no problems whatsoever during our testing. This rifle loaded, fired, and ejected perfectly. The grip angle may feel odd to some, but overall it’s great once you get used to it.” – John C.

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Product Description

“The DDM4ISR features a 9-inch cold hammer-forged barrel with an integrated suppressor that brings the overall barrel length to 16-inches. This means that while this is an NFA firearm because of that suppressor, it is not a multiple NFA firearm. The suppressor features a user-serviceable baffle core that can be removed for cleaning. And the gun runs on a standard pistol-length gas block, all housed inside a 15-inch MFR XL Keymod handguard with Picatinny rail up top.” – John C.

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Daniel Defense DDM4ISR Specs

300 AAC Blackout
7.57 lbs

Daniel Defense DDM4ISR Features

Integrally suppressed
Keymod handguard
Low-angle pistol grip

By The Numbers - Daniel Defense DDM4ISR

Both at our static range and the shoot house, the DDM4ISR hit targets with no issues.
We had no problems whatsoever during our testing. This rifle loaded, fired, and ejected perfectly.
Though it’s an AR-based platform, it also sports Keymod…which isn’t our preferred attachment method. That said, you can still throw an optic and Keymod compatible accessories onto it.
So, the grip angle feels odd at a regular range, running regular drills…but take this gun to a shoot house, and the ergonomics start to make a lot more sense.

Hands-On Reviews & Related Post

Daniel Defense DDM4ISR Variations & Comparables

Daniel Defense DDM4 V7, 5.56 NATO

Daniel Defense DDM4 V7, 5.56 NATO


“Daniel Defense delivers a reliable, accurate AR-15 in the DDM4 V7 with enough extras to keep 5.56 fans interested. Though the pistol grip’s ergonomics are less than ideal, this rifle more than makes up for that with QD mounts, a threaded barrel, and an improved muzzle brake.” – John C.

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Brugger & Thomet APC9 Pro

Brugger & Thomet APC9 Pro


“If you’re a PCC fan, you gotta check out the B&T APC9 Pro.  This gun is well-made and fun to shoot. While we preferred the ergonomics of the Sig MPX, the APC9 has its perks such as low recoil and very accurate. The APC9 Pro has a slightly longer barrel than the APC9K Pro. For a more compact version, check out the APC9K Pro.” – John C.

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final verdict

Daniel Defense’s DDM4ISR seems to be a decent way to snag an integrally suppressed gun chambered for the .300 BLK cartridge intended to do a very specific job…if that’s what you’re after. Remember, you do need a tax stamp, though, because of its integral suppressor. So, factor that into the overall cost While this gun is a little out of our price range, if you have the funds and want the cool factor of an integrally suppressed rifle, the DDM4ISR fits that bill.

Video Review of Daniel Defense DDM4ISR

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