Description

The Daniel Defense DDM4 MK18 RIII is an AR-15-style short-barreled rifle that combines the MK18 upper configuration with Daniel Defense’s RIS III Rail Interface System. It retains a cold-hammer-forged 10.3″ barrel and features a mid-length gas system and ambidextrous controls. The rail provides an uninterrupted upper platform with M-LOK attachment points and integrated QD swivel sockets.

Key Specifications

• Chambered in .223 Rem / 5.56 NATO.
• The barrel measures 10.3 inches and is cold-hammer-forged.
• Equipped with a Black RIS III M-LOK rail offering M-LOK attachment points and an uninterrupted top rail.
• Features a mid-length gas system for reliable cycling.
• Includes an ambidextrous lower with fully ambidextrous controls.
• Uses a Daniel Defense polymer stock and Daniel Defense pistol grip.
• Barrel thread pattern is 1/2×28.
• Rate of twist is 1-in-7.
• Finish is anodized black.
• Weight is listed as 5.73 lbs.

The DDM4 MK18 RIII delivers a compact, purpose-built configuration for users seeking a high-quality, rugged short-barreled platform with modern ergonomics and modular rail options. Its proven barrel construction, ambidextrous controls, and M-LOK-equipped RIS III rail make it well suited to applications where a compact, serviceable AR-style rifle is required.