DANIEL DEFENSE MK18 RIII URG 5.56MM 10.3″ FDE

The Daniel Defense MK18 RIII URG is an upper receiver group designed for compact AR configurations. It is listed for .223 REM/5.56 NATO and features a short Government-length barrel for a compact overall profile. The upper includes a RIS III M-LOK rail and a carbine-length gas system, and it ships with a threaded muzzle for common 1/2×28 devices. Features such as the GRIP-N-RIP charging handle are part of the factory configuration.

Key Specifications

• The product type is Accessory-Uppers.
• The caliber is .223 REM/5.56 NATO.
• The barrel length is listed as 10.3″ Government.
• The rate of twist is 1-in-7″.
• The rail is a FDE RIS III 9.5″ M-LOK Rail.
• The gas system is a Carbine Length Gas System.
• The NFA thread pattern at the muzzle is 1/2×28.
• Included additional features list a GRIP-N-RIP Charging Handle.
• The upper is noted as having a Threaded Barrel as a special feature.
• The listed weight is 4.5.

Built around a short Government-profile barrel and a proven RIS III M-LOK handguard, this MK18 RIII URG upper is intended for compact builds where maneuverability and a short overall length are priorities. Its factory-configured features make it a practical choice for users assembling a compact AR platform that relies on established components and modular accessories.