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Daniel Defense MK18 SBR 5.56 NATO
5.56 NATO • Daniel Defense

Daniel Defense MK18 SBR 5.56 NATO

Model: 02-088-07327-c

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CAPACITY
10.3"
BARREL
5.9
LBS
Carbine Length, Direct Impingement
ACTION
5.56 NATO
CALIBER
$2,499
MSRP

Full Specifications

Action Type Carbine Length, Direct Impingement
Safety Ambi safety selector
Optic Ready Yes
Overall Length (stock extended) 29.88"
Barrel Length 10.3"
Weight 94.1 oz (5.88 lbs)
Receiver Material 7075-T6 Aluminum
Receiver Finish Type III Hard Coat Anodized
Barrel Material Chrome Moly Vanadium Steel, Cold Hammer Forged
Barrel Finish Chrome Lined, Mil-Spec Heavy Phosphate Coated
Twist Rate 1:7"
Thread Pattern 1/2x28
Muzzle Device Daniel Defense Flash Suppressor
Stock Material Glass Filled Polymer with Soft Touch Overmolding
Grip Type Daniel Defense Pistol Grip
Country of Origin United States

Threaded 1/2x28 barrel: compare 5.56 / .223 suppressor prices.

Includes: Daniel Defense Full-Latch Impact Plastic Case; DD Magazine

About This Firearm

The Daniel Defense MK18 SBR is a direct-impingement 5.56 NATO short-barreled rifle built for duty use and home defense. It has an MSRP of $2,499. Its handguard is a full Picatinny quad rail, so a light, a laser and a night vision mount clamp to any side without M-LOK adapters.

An ambidextrous selector lets either hand work the safety, and the stock collapses to 26.75 inches. Sights are sold separately, so a red dot or folding irons must go on before the rifle can be aimed. The 10.3 inch barrel wears a stainless flash suppressor on 1/2x28 threads, which comes off when a can goes on.

If you're cross-shopping, the Daniel Defense DDM4 V7 has an MSRP of $2,073 and the same cold hammer forged, chrome lined barrel at 16 inches, which makes it 35.88 inches and 6.2 lbs against the MK18's 29.875 inches and 5.88 lbs. The Springfield Armory SAINT Victor SBR has an MSRP of $1,249 and aluminum flip-up sights in the box, so it is ready to shoot out of the case while the MK18 needs a sight first.

Best For

GOOD
Duty Use
The barrel is a government profile cut, high pressure tested and magnetic particle inspected, and the low-profile gas block is 4140 hardened steel pinned to it instead of clamped with set screws. A pinned block cannot drift under heat or recoil.
GOOD
Truck or Pack Gun
Daniel Defense packs the rifle in a full-latch impact case with one of its own magazines, so it has somewhere to live behind a seat from the day it arrives. Both receivers are 7075-T6 aluminum with a Type III hard coat anodized finish, which takes knocks without showing bare metal.
FAIR
Suppressed Range Work
The gas block is pinned with no adjustment, so there is no way to dial the system back once a suppressor raises the pressure behind the bullet. More of that gas leaves by the ejection port and the charging handle, which is where your face is.

Strengths & Limitations

Strengths
  • Indexing marks along the receiver rail let an optic go back in the same slot after it comes off.
  • The flash suppressor is 17-4 PH stainless with a salt bath nitride finish, which stands up to the heat a 10.3 inch barrel puts into it.
  • Barrel and gas block share the same mil-spec heavy phosphate coating, so the two parts that get hottest are protected the same way.
Limitations
  • A Picatinny quad rail has cross-slots down its whole length, which is hard on bare hands and on a sling arm.
  • The buttstock and pistol grip are Daniel Defense's own shapes in overmolded polymer, so changing the feel of either means buying another maker's parts.
  • The muzzle sits close to your head on a barrel this short, and the flash suppressor sends blast out to the sides.

Compatible Ammunition

Find the best prices on compatible 5.56 NATO ammunition.

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Ballistics Calculator

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Where to Buy

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Frequently Asked Questions

Will AR-15 parts fit it?

The upper is built to mil-spec dimensions with M4 feed ramps and the lower is AR-pattern, so triggers, grips, stocks and charging handles from the AR-15 market drop in. The quad rail, buttstock and pistol grip that come on it are Daniel Defense parts.

What does a government profile barrel mean here?

Daniel Defense cuts the barrel to the contour the military specified for the M4, thinner under the handguard and heavier ahead of the gas block. It carries heat better than a pencil barrel out front and saves weight where the handguard covers it.

Does shooting it suppressed change the cleaning?

A can sends more carbon back through the action, so the bolt carrier and chamber need attention sooner. The bore itself is chrome lined, which usually comes clean with a wet patch and a brush.