Daniel Defense DD4 MK18RIII, SBR, .223 REM/5.56 NATO, 10.3-Inch

The Daniel Defense DD4 MK18RIII (brand part no. 02-088-10401-047) is a .223 REM/5.56 NATO short-barreled rifle, pairing a 10.3-inch barrel and a 1-in-7 twist rate for a compact, maneuverable platform. Daniel Defense builds the DD4 MK18RIII with a 30-round capacity, a manual safety. The DD4 MK18RIII favors shooters who want a compact, NFA-registered SBR platform.

Key Specifications

• Chambered in .223 REM/5.56 NATO for compact SBR performance.
• Wears a 10.3-inch barrel for a compact SBR profile.
• Cut with a 1-in-7 twist rate.
• Feeds from a 30-round capacity configuration.
• Equipped with a Manual Safety.
• Operates as a Semi-Auto action.
• Includes 1 x 30-Round magazine.
• Equipped with No Sights.
• Wears a DD RIS III M-LOK handguard for a lighter-weight accessory rail.

Frequently Asked Questions

Is this an NFA item? Yes. As a short-barreled rifle (SBR), it's a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What caliber does it fire? .223 REM/5.56 NATO.

How long is the barrel? 10.3 inches.

Buy the Daniel Defense DD4 MK18RIII SBR

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4, no federal transfer tax and transfer through a licensed NFA (SOT/Class 3) dealer, with an extended federal approval wait before delivery. Order through Daniel Defense‘s short barrel rifles lineup and our Lubbock, Texas team will walk you through the transfer process.