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DD MK18 Daniel Defense MK18 Daniel Defense MK18
DD MK18 Daniel Defense MK18 Daniel Defense MK18
  • Runs great with PMAGs
  • Handles really well in CQB environments
  • Very accurate
  • DD mags have to be downloaded to run properly
  • Mags don't seat well if you slam them in magwell
Editor’s Note:

Daniel Defense’s Mk18 runs extremely well. It’s a blast to shoot and handled well in CQB-type training scenarios. We’ve put well over 1,000 rounds through our model, and it’s still running like it did day one. We did have a little trouble with DD proprietary mags — but that was managed by removing a couple of rounds and gently seating it into the magwell. PMAGs run great, though!

The Mk18 is a fun pistol or SBR option (depending on what you prefer). Chambered in 5.56 NATO, it offers a 10.3-inch barrel on a 28.6-inch overall length. Pistol versions sport an SB-Tactical pistol stabilizing brace (keep an eye out, though, as laws may be changing there).

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Daniel Defense MK18 Specs

Barrel Length
Magazine Capacity
5.56 NATO - 223 Rem
Overall Length
26 3/4"– 29 7/8”
5.88 lbs

Daniel Defense MK18 Features

10.3 inch barrel
32 round capacity
SB Tactical pistol brace
1:7 twist government profile barrel
Mil-Spec 1913 Picatinny Rail attachment
Comes with polymer rail covers
Free float rail system

By The Numbers - Daniel Defense MK18

No issues whatsoever hitting targets
Have to download mags but other than that it worked.
It's an AR...you have plenty of options
Pistol grip may take some getting use to

Hands-On Reviews & Related Post

Daniel Defense MK18 Variations & Comparables

(1 rating)
Springfield Armory Saint

Springfield Armory Saint


The Springfield Saint AR-15 is a great entry-level AR-15 that is easy to use and customize. It’s perfect for sporting or home defense with high reliability and some furniture and trigger upgrades that set it apart from other budget AR-15s.

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(1 rating)
Daniel Defense DDM4 V1

Daniel Defense DDM4 V1

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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Daniel Defense DDM4ISR

Daniel Defense DDM4ISR


“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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(2 ratings)
Daniel Defense Delta 5 Pro

Daniel Defense Delta 5 Pro


“If you want a Daniel Defense bolt rifle then we recommend the Delta 5 Pro. It’s a great rifle and it looks good to boot. It produced sub-half MOA with 3-round groups and solidly under MOA with 5-shot groups. We consider that a win. While not the elitist PRS shooter, it’s a great out of the box solution.” — David Lane

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final verdict

“In the market for an AR-15 that runs exceedingly well? Or do you like that distinctive MK18 silhouette? Then the Daniel Defense MK18 is a fantastic option.” — John C.

Video Review of Daniel Defense MK18

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