The Daniel Defense MK18 SBR is a black 5.56mm NATO short-barreled rifle on a 10.3-inch cold hammer forged barrel (Daniel Defense part no. 02-088-07327). It follows the barrel length used on the MK18 upper in close-quarters work and carries the RIS II picatinny quad rail that the company supplies to USSOCOM. The charging handle is the ambidextrous GRIP-N-RIP, and the stock and pistol grip are Daniel Defense parts. A 32-round DD Magazine and a full-latch impact plastic case ride with it. It is a fit for vehicle carry, home defense and close-quarters training.

Key Specifications

• The chambering is 5.56mm NATO, the standard AR-15 service cartridge with the widest choice of training and defensive loads.
• Barrel length is 10.3 inches, short enough for tight spaces while keeping useful 5.56 velocity.
• The barrel is cold hammer forged chrome moly vanadium steel with a Government profile, chrome lined, and it carries a 1:7 twist.
• The handguard is the MK18 RIS II picatinny quad rail with a Bolt-Up System, which gives mounting space on all four sides.
• The gas system is carbine length, direct impingement, with a pinned low-profile gas block.
• The muzzle device is the Daniel Defense flash suppressor on 1/2×28 threads, which cuts flash and accepts common thread-on muzzle accessories.
• The charging handle is the ambidextrous GRIP-N-RIP, so it runs the same from either shoulder.
• Weight is listed at 5.88 pounds, light enough to carry and swing quickly.
• Overall length runs 26 3/4 to 29 7/8 inches with the muzzle device, depending on stock position.
• Sights are sold separately, so you pick the optic or iron sights that suit the job.

Frequently Asked Questions

Does this rifle include sights? No. Daniel Defense lists sights as sold separately, and the quad rail has room for an optic and backup irons.

What comes in the box? The rifle ships with a 32-round DD Magazine and a Daniel Defense full-latch impact plastic case.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for short-barreled rifles. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply. Taking an SBR across state lines still requires an approved ATF Form 5320.20.

Buy the Daniel Defense MK18 SBR, 5.56 NATO, 10.3-Inch Barrel, Black

As of October 9, 2026, this short-barreled rifle transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through Daniel Defense‘s short-barreled rifles lineup and our Lubbock, Texas team will handle the transfer. A short barrel, a proven rail and a maker-supplied case make this a ready-to-build MK18 SBR.