Daniel Defense MK18 SBR
Daniel Defense MK18 - 10.3" Short Barrel Rifle
Own the same combat-proven platform trusted by USSOCOM. The Daniel Defense MK18 Factory SBR delivers unmatched performance in a compact 10.3" configuration, making it perfect for CQB applications, home defense, and tactical operations. The MK18 RIS II rail system uses Daniel Defense's proprietary Bolt-Up System, the same configuration trusted by U.S. Special Operations Command. This isn't a civilian approximation, it's the real deal. It features identical specifications to rifles used in active military service, with over 15,000 units field-tested in the most demanding environments.
The 10.3" cold hammer forged barrel delivers the perfect balance of maneuverability and ballistic performance. This barrel length is standard for Special Operations MK18 uppers, specifically chosen for close-quarters battle operations where speed and agility are critical. Every component meets or exceeds Mil-Spec requirements. The cold hammer forged barrel undergoes HP/MPI testing, while the chrome-lined bore and chamber ensure exceptional durability and reliability across thousands of rounds.
Unlike building your own SBR through Form 1, the MK18 arrives as a complete, factory-assembled firearm. You get Daniel Defense's lifetime warranty, quality control, and the confidence of a purpose-built short barreled rifle engineered to exacting standards.
Features
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10.3" Government Profile barrel, 1:7 twist rate, cold hammer forged
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Carbine-length direct impingement gas system
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Mil-Spec with M4 feed ramps and indexing marks
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Enhanced flared magazine well for faster reloads
- MK18 RIS II Rail System
- Includes 3 low-profile Santoprene rail ladders (heat resistant to 300°F)
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M16 profile bolt carrier group
- H buffer for reliable cycling with short barrel configuration
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Daniel Defense buttstock, Daniel Defense pistol grip
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6-position Mil-Spec receiver extension (7075-T6 aluminum)
What's Included
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Daniel Defense MK18 Factory Short Barrel Rifle (10.3")
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Factory Manual and Warranty Information
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One Daniel Defense full-compacity Magazine
Why Buy Your SBR from Capitol Armory
Capitol Armory's expertise gets you error-free submissions faster than anyone else. Our compliance team has processed thousands of NFA transfers and knows exactly how to prepare your application quickly while maintaining 100% ATF compliance. Once your Form 4 is approved, your Daniel Defense MK18 SBR ships directly to your door with no additional FFL transfers, no extra fees, no complications. We handle everything from ATF approval to final delivery.
| Weight | 5lb 14oz |
|---|---|
| Manufacturer | Daniel Defense |
| Caliber | 5.56mm |
| Action | Semi-Auto; Closed bolt |
| Barrel | 10.3 |
| Length | 26.75 - 30 |
| Thread Pitch | 1/2x28 |
| Magazine | x1 Daniel Defense magazine |
| Finish | Cerakote |
| Warranty | Lifetime |
This is a civilian legal short barrel rifle (SBR).
The Daniel Defense MK18 SBR features the railed forend Daniel Defense currently provides to USSOCOM and a 10.3” Cold Hammer Forged Barrel. The Flat Dark Earth MK18 rail system features the Bolt-Up System™ has been rigorously tested prior to fielding by USSOCOM (currently over 15,000 units). The 10.3” barrel is the same length in use for the MK18 upper most commonly used for CQB operations. The MK18 Factory SBR by Daniel Defense is unmatched in size, weight, and performance. This rifle also comes with the newly designed, rugged and comfortable Daniel Defense Buttstock and Pistol Grip.
The Daniel Defense MK18 comes in black and is the latest version with the Daniel Defense furniture. The FDE version is a black rifle with a FDE anodized rail.