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Daniel Defense MK18 Rifle

Daniel Defense MK18 Rifle

Manufacturer: Daniel Defense
Category: Small Arms & Infantry Weapons
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Caliber 5.56x45mm NATO
Effective Range 300m (Effective)
Rate of Fire Semi-Automatic (Civilian) / 700-950 RPM (Mil-Spec)
Weight 5.88 lbs

Full Specifications

1. General Information

Name	Daniel Defense MK18
Weapon Type	Short-Barreled Rifle (SBR)
Manufacturer	Daniel Defense
Country of Origin	United States
Year Introduced	2000 (Current Gen 2020+)
Designer	Daniel Defense / NSWC Crane
Service Status	In Service
Users	US SOCOM, Law Enforcement, Civilians

2. Performance

Muzzle Velocity	~2,600 fps
Effective Range	300 Meters
Maximum Range	500 Meters
Rate of Fire	Semi-Auto
Accuracy	Sub-MOA capable
Reliability	High (Mil-Spec Heavy Duty)

3. Dimensions

Overall Length	26 ¾” – 29 ⅞”
Barrel Length	10.3"
Weight (Empty)	5.88 lbs

4. Ammunition & Firepower

Caliber	5.56mm NATO
Cartridge Type	Centerfire
Feed System	Magazine (DD Mag 32-round)
Operating Mechanism	Direct Impingement

5. Build & Materials

Construction	7075-T6 Aluminum
Durability	Chrome Moly Vanadium Steel
Ergonomics	Daniel Defense RIS II

6. Sights & Accessories

Standard Sights	Optic-ready (No iron sights included)
Optics Compatibility	MIL-STD-1913 Picatinny Rail
Accessory Mounts	MK18 RIS II Quad-Rail (Flat Dark Earth or Black)
Optional Attachments	Suppressor, Weapon Light, IR Laser (PEQ-15), Foregrip

7. Variants

Variants

MK18 Mod 0, MK18 Mod 1, MK18 Pistol

8. Operational History

Combat Proven	Yes
Notable Conflicts	War in Afghanistan, Iraq War, Operation Inherent Resolve
Military Adoption	US Navy SEALs, MARSOC, Army Special Forces

9. Additional Notes

Special Features	RIS II Rail is the only rail system authorized by SOCOM.
Modern Upgrades	Ambidextrous safety, GRIP-N-RIP charging handle, pinned gas block.

10. Disclaimer

Legal Notice

Information is for educational purposes only. TheDefenseWatch.com does not sell, trade, or promote illegal acquisition of firearms.

Our Rating

The overall rating is based on review by our experts

7.5

Reliability 8 / 10
Firepower / Lethality 8 / 10
Accuracy 7 / 10
Versatility / Modernization 7 / 10

PROS

Cold Hammer Forged Barrel: Exceptionally long service life and resistance to heat.
RIS II Rail System: The most battle-proven quad rail in the world for accessory security.
SOCOM Heritage: Built to the exact specifications used by elite Tier 1 units.
Compact Dimensions: Only 26.75 inches long, making it the king of vehicle-borne ops.
Quality Control: Backed by Daniel Defense’s 100% satisfaction "Full Lifetime Warranty."

CONS

NFA Restrictions: Requires ATF registration, finger-printing, and a $200 tax.
Weight: The robust RIS II quad rail is heavier than modern M-LOK counterparts.
Aggressive Gas Port: Short-barreled gas systems create more carbon fouling in the receiver.
Price Point: Significant investment compared to entry-level AR-15s.
Concussive Blast: Loud and high-pressure muzzle report when unsuppressed.

The Daniel Defense MK18 is the commercial and professional realization of the United States Special Operations Command (SOCOM) MK18 CQBR. While many manufacturers attempt to replicate the MK18’s aesthetic, Daniel Defense is the sole provider of the RIS II handguard to SOCOM, making this specific rifle the closest a user can get to the “real deal.” Engineered for extreme durability and agility, it is designed to dominate in tight quarters where a full-length carbine becomes a liability.

Manufacturer

This variant is manufactured by Daniel Defense in Black Creek, Georgia. Known for their “Cold Hammer Forging” process, Daniel Defense produces barrels with superior longevity and accuracy. The rifle is characterized by the iconic FDE (Flat Dark Earth) RIS II quad-rail, which “free-floats” the barrel to ensure that accessories mounted to the rail do not shift the point of impact.

Speed and Range

The MK18 utilizes a 10.3-inch Government Profile barrel with a 1:7 twist rate, optimized for heavy 5.56mm projectiles like the 77gr OTN. While the muzzle velocity is naturally lower than an M4A1 (averaging around 2,550–2,600 fps), it maintains lethal ballistics and “clover-leaf” accuracy out to 300 yards. Its carbine-length gas system is tuned to provide a smooth recoil impulse, allowing for rapid-fire “speed” during transitions.

Cost/Price

The Daniel Defense MK18 SBR carries an MSRP of approximately $2,100 to $2,300. As an NFA-regulated Short-Barreled Rifle, U.S. civilian buyers must also factor in a $200 Federal Tax Stamp and the associated ATF wait times.

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