DANIEL DEFENSE DD4 MK18RIII SBR | 5.56 | 10.3″ | 02-088-10401-047

The Daniel Defense DD4 MK18RIII is a short-barreled rifle platform built around a 10.3-inch cold hammer-forged barrel and the company’s RIS III free-float rail. It uses a proven upper design and an uninterrupted top rail with M-LOK attachment points, and it includes ambidextrous controls and Daniel Defense furniture. For an optic under $1,000 that pairs with the MK18RIII, a rugged red-dot such as the Aimpoint PRO provides a clear, fast aiming solution well-suited to close-range work.

Typical applications include close-quarters training and range-focused tactical practice where a compact, highly maneuverable rifle is preferred.

Product Specifications

• The caliber is .223 Rem / 5.56 NATO.
• The barrel measures 10.3 inches and is cold hammer-forged.
• The action is Semi-Auto.
• The barrel type is Cold Hammer Forged for consistent performance.
• The rifle features an ambidextrous configuration with Ambidextrous controls.
• The stock is a Daniel Defense Stock made with polymer components.
• The finish is Anodized Black.
• The handguard is a RIS III M-LOK Rail with seven M-LOK attachment points and QD swivel sockets.
• The muzzle device is a Flash Hider attached to a threaded muzzle.
• The rifle ships with No Sights installed.
• The barrel twist rate is 1-in-7.
• The muzzle thread pattern is 1/2×28.
• The unloaded weight is approximately 5.73 lbs.
• The overall length is listed as 26.5–30 inches depending on stock position.
• The UPC is 818773023252.

The DD4 MK18RIII is focused on compact handling and modular accessory mounting. Its combination of a short cold hammer-forged barrel and a full-length free-float RIS III rail provides a stable platform for close-range use while preserving options for optics and accessories. The ambidextrous controls and Daniel Defense furniture offer ergonomic operation for a wide range of users.

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