The Daniel Defense MK12 5.56 AR-15 rifle represents serious engineering for shooters who demand precision and reliability. Built around an 18-inch cold hammer-forged stainless steel barrel with DLC finish, the MK12 delivers the accuracy and durability that made it a standout in professional hands. This is a rifle-length direct impingement system purpose-built for precision shooting, whether on the range or in a tactical role—and it's designed and manufactured in the USA.
What sets the MK12 apart is attention to detail across every component. The barrel's cold hammer-forging process ensures precise chamber-to-bore alignment, and the proprietary 1:7 twist profile handles a wide range of 5.56 ammunition. A MK12 low-profile gas block—engineered to USSOCOM specifications—keeps the system running smooth and reliable. The 12-inch free-floating Picatinny quad rail gives you independent mounting flexibility for optics and accessories, while the GRIP-N-RIP charging handle works equally well for left- and right-handed shooters. A Geissele SSA 2-stage trigger rounds out the package, giving you the control needed for precise fire.
The lower and upper receivers are CNC-machined from 7075-T6 aluminum with Type III hard-coat anodizing for durability in harsh conditions. The enhanced flared magazine well and rear QD swivel attachment point are practical touches for tactical use. From the stainless steel flash suppressor to the H-buffer and M16-profile bolt carrier group, every part is chosen for function. You get Daniel Defense furniture—a buttstock and pistol grip with soft-touch polymer grip surfaces and Santoprene rail panels that stand up to heat. This is a rifle built to work.
| Caliber | 5.56mm NATO |
| Barrel Length | 18 inches |
| Barrel Profile | MK12 |
| Barrel Twist | 1:7 |
| Barrel Material | Stainless Steel, Cold Hammer-Forged, DLC Finished |
| Gas System | Rifle-Length Direct Impingement |
| Gas Block | MK12 Low-Profile, 416 Stainless Steel, Black Oxide Coated |
| Muzzle Device | Daniel Defense Flash Suppressor, 1/2x28 TPI Thread |
| Handguard | DDM4 Rail, 12-inch, Free-Floating Picatinny |
| Bolt Carrier Group | M16 Profile, Mil-Spec, Chrome Lined |
| Upper Receiver | CNC Machined 7075-T6 Aluminum, Type III Hard Coat Anodized, M4 Feed Ramps |
| Lower Receiver | CNC Machined 7075-T6 Aluminum, Type III Hard Coat Anodized, Enhanced Flared Magazine Well |
| Charging Handle | GRIP-N-RIP Ambidextrous |
| Trigger | Geissele SSA 2-Stage |
| Stock | Daniel Defense Buttstock, 6-Position Adjustable, Glass-Filled Polymer |
| Pistol Grip | Daniel Defense, Glass-Filled Polymer with Soft-Touch Overmolding |
| Buffer | H Buffer |
| Weight | 7.41 lbs |
| Length (Collapsed/Extended) | 34 3/4" to 37 7/8" |
| Mounting System | Picatinny Rails |
| Magazine | DD Magazine (Included) |
| Origin | Made in the USA |
The 12-inch free-floating Picatinny quad rail accommodates any standard Picatinny-mounted optic or accessory. You have full flexibility to configure the rail to your preferences. Sights are sold separately.
The GRIP-N-RIP charging handle is ambidextrous and works equally well for left- and right-handed shooters. The rifle also features a rear QD swivel attachment point for sling mounting.
The MK12 is chambered in 5.56mm NATO with a 1:7 twist barrel, which handles the full range of 5.56 ammunition types reliably.
The MK12 ships with a DD magazine. Optics and backup sights are sold separately.
Firearm Shipments:
To buy rifles or shotguns, you must be 18 years old, and for handguns, actions, or receivers, the minimum age is 21. By placing an order for this firearm, you confirm that you are the legitimate transferee/buyer, meet the legal age requirements, and comply with all Federal, State, and local laws and regulations necessary to purchase this firearm.
We only ship firearms to valid Federal Firearms License (FFL) holders. At checkout we provide a FFL locator for your convenience.
We will need a copy of the FFL’s license to facilitate the process, kindly request your dealer to email us a copy of their FFL, as we cannot dispatch the firearm until we receive this document. It is imperative for the buyer to choose their FFL dealer, ensure they are willing to facilitate the transfer, and have them email their FFL copy to BOSQUE Outdoors. To avoid any confusion, the customer's name or order number must be mentioned in the email containing the FFL.
Email: [email protected]
Daniel Defense
Daniel Defense
Daniel Defense
Daniel Defense
