Daniel Defense DDM4 MK18 AR-15 Pistol, 5.56 NATO, 11.5 in Barrel, RIS II MK18 Quad Rail, SB Tactical Brace
This Daniel Defense DDM4 MK18 AR-15 pistol pairs the proven 11.5-inch MK18 pattern with the RIS II MK18 free-float quad rail and a direct-impingement system. It features an open-prong flash hider, SB Tactical stabilizing brace, and a custom decorative magwell engraving. It comes with three 30-round magazines and is built in the United States.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are some scratches and blemishes present.
What’s Included
- 3x 30-round magazines (Magpul PMAG polymer and OKAY Industries USGI aluminum)
- Angled foregrip (installed on bottom rail)
- Polymer rail cover/heat panel (installed on top/front rail)
- SB Tactical pistol stabilizing brace (installed)
The pistol is built around an 11.5-inch barrel in the MK18 pattern and uses a direct-impingement operating system. The barrel is threaded and fitted with an open-prong flash hider. The upper includes a forward assist, case deflector, and a Daniel Defense–marked ejection-port cover.
Its handguard is the Daniel Defense RIS II MK18 free-float quad rail with the 6-bolt Bolt-Up interface and numbered Picatinny slots. This setup provides rigid mounting and clear indexing across all four rails.
The lower is marked MODEL DDM4 with maker markings for Daniel Defense, Black Creek, GA, U.S.A. Controls include a manual safety selector. Furniture consists of a textured ergonomic polymer pistol grip and an SB Tactical pistol stabilizing brace. An angled foregrip is installed, along with a polymer rail cover/heat panel on the top/front rail. No sights are installed.
Customization includes a decorative engraving on the right-side magwell featuring a four-leaf motif with lightning bolt/sun/star elements. The pistol is chambered in 5.56mm NATO with a stated capacity of 30+1 and includes three 30-round magazines.