The Daniel Defense MK18 RIS II Complete Upper (Daniel Defense part no. 23-004-08013-011) is built around the Picatinny quad rail Daniel Defense supplies to USSOCOM. The RIS II rail uses a bolt-up system that was tested before fielding. Its 10.3-inch cold hammer forged barrel is the length most commonly used for MK18 uppers in close quarters operations. A GRIP-N-RIP charging handle accommodates left- and right-handed shooters. This listing is the FDE version of the group.

Key Specifications

• Caliber is 5.56mm NATO, the standard AR-15 chambering.
• The barrel is 10.3 inches of cold hammer forged chrome moly vanadium steel in the Government profile.
• Twist rate is 1:7, matched to heavier bullets.
• The bore is chrome lined and mil-spec phosphate coated.
• The gas system is carbine length direct impingement with a pinned low-profile gas block.
• The muzzle device is a Daniel Defense flash suppressor in 17-4 PH stainless.
• The handguard is the RIS II MK18 quad rail, machined from 6061-T6 aluminum.
• Rail panels are Santoprene, heat resistant to 300 degrees Fahrenheit.
• The charging handle is the GRIP-N-RIP, independently ambidextrous.
• The group weighs 3.5 pounds.

Frequently Asked Questions

What is the RIS II rail? It is the Picatinny quad rail Daniel Defense provides to USSOCOM, with a bolt-up system that was tested before fielding.

Does it include a bolt carrier group? Yes. Daniel Defense complete upper receiver groups come standard with an M16 profile bolt carrier group.

Does it come with sights? No. Sights are sold separately.

Buy the Daniel Defense MK18 RIS II 10.3-Inch 5.56mm Upper Receiver Group, FDE

Order it with our other AR-15 uppers from our Lubbock, Texas gun shop for fast, insured shipping.