Daniel Defense MK18 RIS III Complete AR-15 Upper Receiver - 5.56 - 10.3" - FDE

The Daniel Defense MK18 RIS III Complete AR-15 Upper Receiver in Flat Dark Earth pairs a 10.3" cold hammer forged barrel with the lightweight RIS III M-LOK rail, trading the standard MK18's RIS II handguard for a lighter, M-LOK-equipped rail.

Features:

• 10.3" cold hammer forged barrel, chrome lined, 1:7 twist
• Carbine-length gas system with pinned low-profile gas block
• Daniel Defense flash suppressor, 17-4 PH stainless, salt bath nitride finish
• 9.5" lightweight RIS III M-LOK handguard
• M16-profile bolt carrier group, chrome lined, properly staked gas key
• GRIP-N-RIP charging handle
• FDE Type III hard coat anodized finish
• Bolt carrier group and charging handle included

The 9.5" RIS III rail is modeled on the SOCOM-developed RIS II but trimmed down in weight, giving this MK18-length build M-LOK attachment points instead of the original quad-rail layout. The GRIP-N-RIP charging handle and M16-profile bolt carrier group are shared with the rest of Daniel Defense's complete upper lineup for consistent reliability.

Because this 10.3" barrel measures under 16", this complete upper is intended only for an AR pistol or a legally registered short-barreled rifle — attaching it to a standard rifle lower without the correct configuration violates federal law.

Daniel Defense has supplied duty-grade AR-15 rifles and components to U.S. special operations units, law enforcement, and civilian shooters for over two decades, and this complete upper carries that same mil-spec pedigree.