Daniel Defense MK18 Upper Receiver 10.3" 5.56 FDE

Daniel Defense MK18 Upper Receiver Group

The MK18 represents the pinnacle of short-barreled upper receiver design, combining proven military specifications with civilian-grade precision manufacturing. This is the same platform trusted by elite special operations units for close quarters battle.

Key Features

• 10.3" Cold Hammer Forged Barrel — Government profile with 1:7 twist rate, chrome lined and heavy phosphate coated for durability and corrosion resistance
• RIS II Quad Rail System — The same Picatinny rail configuration provided to USSOCOM, featuring a rigorously tested bolt-up mounting system
• Ambidextrous GRIP-N-RIP Charging Handle — Independently operated for both left- and right-handed shooters
• M16 Profile Bolt Carrier Group — Mil-spec construction with chrome lining, properly staked gas key, and MP tested
• Pinned Low Profile Gas Block — Carbine length direct impingement system with CNC machined 4140 hardened steel construction
• Daniel Defense Flash Suppressor — 17-4 PH stainless steel with salt bath nitride finish

Construction & Materials

• Upper Receiver — 7075-T6 aluminum, Type III hard coat anodized with mil-spec indexing marks and M4 feed ramps
• Handguard — 6061-T6 aluminum RIS II design, Type III hard coat anodized with heat-resistant Santoprene rail panels
• Charging Handle — 7076-T6 aluminum body with 6061-T6 aluminum handles and heavy duty stainless steel roll pins

Important Notes

This upper receiver group is designed to mate with AR-15 pattern lower receivers. When assembled into a complete firearm, it becomes subject to National Firearms Act regulations. Verify all local and state legal requirements before assembly and use. Sights sold separately.

Made in the USA.