Daniel Defense DD4 MK18RIII 5.56mm 10.3″ (No Mag) Rifle 02-088-00319-055



Daniel Defense’s MK18 RIII is an upgraded version of the popular MK18 platform, offering less weight and greater flexibility. This short barreled rifle is outfitted with the exclusive RIS III rail system – an optimized version of the renowned RIS II rail that was developed by SOCOM. The RIS III rail system is lighter than the RIS II but still provides extreme durability, and multiple M-LOK attachment points allow for the installation of tactical lights/lasers, vertical grips, and other M-LOK compatible accessories. The RIS III incorporates the 6-Bolt, Bolt-Up system, an attachment that is strong enough to withstand the recoil from an M203 grenade launcher. Another notable upgrade is fully ambidextrous controls including the safety selector, bolt release, and charging handle to allow both left and right handed to operate the rifle without moving their dominate hand from the grip. In addition, the MK18 RIII features a 10.3” chrome-lined, heavy phosphate-coated Government-profile barrel for excellent maneuverability and durability.

Features of the MK18 RIII:

  • Fully ambidextrous controls
  • Lightweight 9.5” RIS III rail with multiple M-LOK attachment points
  • Full-length flattop picatinny rail
  • 10.3” chrome-lined, heavy phosphate-coated Government-profile barrel





  • Caliber:5.56mm
  • Weight:6 lb 2.5 oz
  • Rifle Overall Length:26-3/4″ – 29-7/8″
  • Safety:Ambidextrous AR-selector
  • Rifle Barrel Length:10.3″
  • Rifle Barrel Twist:1:7″
  • Rifle Stock:Collapsible stock
  • Scope Mount:Full length picatinny rail
  • Magazines Included:N/A
  • Iron SightsNo
  • Caliber or Gauge:5.56 x 45mm NATO
  • HandednessAmbidextrous
  • Item ConditionNew
  • Product TypeRifles
  • UPC818773022989
  • MPN02-088-00319-055


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