Daniel Defense DDM4 MK18 RIII 10.3" 5.56 NATO AR Pistol with Geissele 2-Stage Trigger
The MK18 RIII pistol blends Daniel Defense’s SOCOM-proven MK18 heritage with the latest RIII receiver and handguard updates. A cold hammer forged 10.3-inch chrome-lined barrel, ambidextrous lower controls, and factory-installed Geissele 2-stage match trigger give this short, maneuverable platform exceptional reliability and crisp trigger control.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Specific Condition Notes: Light signs of wear and handling.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling – Sharp lands and grooves.
What’s Included
- 1 × 30-round Magpul PMAG Gen M3 polymer magazine
The heart of this MK18 RIII is its 10.3-inch chrome-moly-vanadium steel barrel, cold hammer forged for long life and chrome lined for easy maintenance. A 1:7 right-hand twist stabilizes a wide range of 5.56 NATO projectiles, while the stainless open-prong flash suppressor threads to the standard 1/2-28 pattern.
Daniel Defense’s RIS III 9.5-inch M-LOK handguard continues the top Picatinny rail across the receiver and integrates QD sling sockets for fast attachment points. The government-profile barrel mates to a carbine-length gas system for proven reliability in compact configurations.
Forged 7075-T6 aluminum receivers feature an enlarged, flared magazine well and fully ambidextrous bolt catch, magazine release, and safety selector. The GRIP-N-RIP ambidextrous charging handle complements these controls, making manipulations easy for right- or left-handed shooters.
A Geissele 2-stage match trigger is factory installed, delivering a smooth first stage and a crisp second-stage break that enhances precision. The pistol ships with a lightweight, adjustable brace offering multiple length-of-pull positions and a rear single-point sling attachment for flexible carry options.