Daniel Defense DDM4 MK18 5.56 NATO SBR, 10.5 in Barrel, MK18 RIS II Quad-Rail, Earth-Tone Brown
This Daniel Defense DDM4 MK18 is a factory-configured short-barreled rifle chambered in 5.56 NATO with a 10.5 in threaded barrel. It features the MK18 RIS II quad-rail with CAGE Code 3E3E2 and U.S. Patent No. 7,716,865, a continuous Picatinny top rail with T-marked slots, and Daniel Defense fixed iron sights. The upper is marked "MK18," and the rifle is finished in an earth-tone brown.
This is an NFA item: Short barrel rifle.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The firearm shows minimal handling wear overall. There are light scratches present on the frame finish.
What's Included
- Daniel Defense fixed iron sights; rear sight marked DD-11002 (installed)
- Angled foregrip on bottom rail (installed)
- Polymer rail panels on side rails (installed)
- One Magpul PMAG 30-round polymer magazine
The MK18 configuration centers on a 10.5 in, threaded 5.56 NATO barrel and a semi-automatic, gas-operated, direct impingement system on the AR-15 platform. Capacity is 30+1. The rifle is built in the USA and uses an aluminum receiver finished in an earth-tone brown.
The Daniel Defense MK18 RIS II quad-rail handguard provides four Picatinny rails, with a continuous, T-marked top rail for consistent accessory placement. This example includes an angled foregrip and polymer rail panels on the side rails for added control and protection.
Factory Daniel Defense fixed iron sights are installed, with the rear sight marked DD-11002. The upper receiver is marked "MK18," and the handguard is marked "MK18 RIS II" with CAGE Code 3E3E2 and U.S. Patent No. 7,716,865, aligning this rifle with the correct MK18 component set.
Daniel Defense-branded parts include the charging handle and bolt carrier group. The selector is marked SAFE/SEMI. The collapsible stock features a QD sling socket, and the Daniel Defense pistol grip uses textured panels for a secure hold.



