Daniel Defense DD4 MK18 RIII SBR, 5.56 NATO, 10.3″ Barrel, FDE, No Magazine

Product Description

The Daniel Defense DD4 MK18 RIII, part 02-088-00319-067, is an NFA short-barrelled rifle in 5.56mm NATO built on a 10.3-inch Government profile barrel with a RIS III 9.5 M-LOK rail in Flat Dark Earth, and Daniel Defense supplies this part number without a magazine.

Daniel Defense gives the no-magazine build its own part number and changes nothing else: same barrel, same receivers, same assembly. Order the standard DD4 MK18 RIII 10.3-inch SBR instead if you do not need it. Capacity rules are set at state and local level and they change, so confirm the current requirements for your own jurisdiction first. Send us a message for help sourcing a compliant magazine, or see our magazine selection.

Key Facts

• Model: DD4 MK18 RIII
• Manufacturer Part Number: 02-088-00319-067
• Legal category: NFA short-barrelled rifle
• Caliber: 5.56mm NATO
• Barrel: 10.3″, Government profile, 1:7 twist, Cold Hammer Forged
• Gas system: Carbine-length
• Muzzle: Daniel Defense flash hider, 1/2 x 28 TPI thread
• Rail: Daniel Defense RIS III 9.5 M-LOK, Flat Dark Earth
• Controls: Fully ambidextrous lower; ambidextrous GRIP-N-RIP charging handle
• Configuration: Supplied without a magazine
• Weight and overall length: Send us a message to confirm

NFA Short-Barrelled Rifle

This is an NFA short-barrelled rifle. It requires a BATFE tax stamp and an approved transfer through a dealer holding a Special Occupational Tax stamp; Western Sport is an SOT and a licensed FFL, and like every firearm here it transfers through a licensed FFL. We state no wait times or tax amounts and give no guidance on the registration process.

Ordering from Western Sport

Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Frequently Asked Questions

Q: What is different about the no-magazine DD4 MK18 RIII?

A: Only the packaging. The 10.3-inch barrel, RIS III 9.5 rail, ambidextrous lower and fire control match the standard part number; Daniel Defense simply ships this SKU with no magazine so a dealer can supply a compliant one. Send us a message to confirm carton contents.

Q: Does it still need a tax stamp with no magazine in the box?

A: Yes. The magazine has no bearing on NFA status. This is a short-barrelled rifle, so a BATFE tax stamp and an approved transfer through a dealer holding a Special Occupational Tax stamp are required. Western Sport is an SOT. We quote no wait times or tax amounts.

Q: What magazines fit the DD4 MK18 RIII?

A: It is an AR-15/M16 pattern firearm, so magazines built for that pattern are what it takes, and capacity is the part governed where you live.

Q: How does the RIS III rail differ from the RIS II?

A: RIS III is modelled on the RIS II developed for SOCOM but uses M-LOK instead of a Picatinny quad, giving durability at lower weight while still allowing M203 grenade-launcher attachment. This part number carries the 9.5-inch RIS III finished in Flat Dark Earth to match the rifle.

Q: Are the controls ambidextrous on this build?

A: Yes. The RIII lower is fully ambidextrous, letting either hand work the bolt catch, safety selector and magazine release without leaving the grip, and the GRIP-N-RIP charging handle is independently ambidextrous too. Left-handed shooters need no aftermarket parts for those three functions.