Daniel Defense MK18 Upper Group 5.56 NATO 10.3 inch FDE

The Daniel Defense MK18 Upper Receiver Group is a complete AR-15 upper assembly built to common MK18 configuration standards. It includes a 10.3 inch cold-hammer-forged barrel with a 1:7 rate of twist, a 7075-T6 aluminum mil-spec receiver, and the DD RIS II MK18 handguard in Flat Dark Earth. The assembly ships with an M16-profile bolt carrier group and an ambidextrous GRIP-N-RIP charging handle.

Key Specifications

• The caliber is .223 REM/5.56 NATO.
• The barrel measures 10.3 inches.
• The barrel uses a 1:7 rate of twist.
• The receiver is machined from 7075-T6 Aluminum.
• The handguard is the DD RIS II MK18 in Flat Dark Earth.
• The barrel contour is Government.
• The gas system is Carbine Length Direct Impingement with a pinned low-profile gas block.
• The thread pattern for the muzzle device is 1/2x28.
• The bolt carrier group is supplied as M16 profile.
• The listed weight is 4.65 lbs.

This upper receiver group provides the compact footprint and feature set commonly associated with MK18 configurations: a short, cold-hammer-forged barrel, a modular RIS II for mounting accessories, and components sized and finished for integration on AR-15 platforms. It is suitable for builders and shooters seeking a factory-configured short-barrel upper with established component compatibility and military-origin design elements.