daniel defense mk18 riii 10.3 sbr fde ris iii
$2,196.00 $2,079.00 Add to cart




Barrel Material: 4150 Chrome Moly Vanadium
Barrel Type: Cold Hammer Forged
Barrel Profile: Government
Rifling Twist: 1:7″
Gas System Length: Carbine
Muzzle Device: Flash Suppressor
Overall Length: 26 3/4″- 29 7/8″
Weight (unloaded): 5.73 LBS
Rail System: RIS III 9.5

*Class 3 NFA Item will need to be Form 3 to your local FFL/SOT dealer*

1 in stock

The DANIEL DEFENSE MK18 RIII 10.3 SBR FDE RIS III has LESS WEIGHT, MORE FLEXIBILITY—with additional features that make this unmatched short-barreled rifle even lighter, more maneuverable, and more controllable. The MK18 RIII features a fully ambidextrous lower receiver, and we’ve replaced the RIS II rail system with a lighter-weight RIS III rail system that utilizes M-LOK attachment instead of picatinny. Class III dealers only; all NFA rules apply.

+10.3″chrome-lined, heavy-phosphate-coated Government-profile barrel provides outstanding maneuverability & durability

+Fully ambidextrous lower enables shooter to operate important rifle mechanisms without moving dominant hand from rifle grip

+9.5″RIS III Rail—modeled after the RIS II two-piece handguard developed for SOCOM—features M-LOK attachment for lighter weight

View the DANIEL DEFENSE MK18 RIII 10.3 SBR FDE RIS III on Daniel Defense’s website here.

See other Daniel Defense products we carry here.

If there is a specific Daniel Defense product you want that is not listed on the site, give us a call and we can special order it for you!

Rail Interface System History Below

In January of 2003, Marty participated in the company’s first SHOT Show, the firearm industry’s largest trade show, where manufacturers come together to introduce and promote their wares. There, in his 10×10 booth, representatives of the U.S. Naval Surface Warfare Center (NSWC), Crane Division approached Marty to develop and submit a forend rail system for an upcoming contract solicitation issued by the Special Operations Command (SOCOM). In order to raise the necessary funds required to participate in the solicitation, Marty approached his father, who decided to support his son’s vision by literally betting the farm.

The fourth-generation family farm was used as collateral to acquire a $250,000 loan. That money allowed Daniel Defense to purchase the materials, equipment, and inventory to create a rail for the M4. Still a small business, in 2003 Daniel Defense went toe-to-toe with every major defense-industry manufacturer for the SOCOM contract. Marty developed and submitted prototypes, relying on sales of the original M4 rail system and sling loops to carry the company through 2004, when the contract was awarded to Daniel Defense, the lone David amongst a slew of Goliath competitors.

Daniel Defense once again emerged as the victor of the competition for this SOCOM contract in 2005.  In 2006, Daniel Defense delivered the first RIS II forends to SOCOM, right on schedule.

Additional information

Weight 15 lbs
Dimensions 43 × 11 × 4 in