Daniel Defense MK18 RIII SBR 5.56 223 10.3" 32-Round Rifle

The Daniel Defense MK18 RIII SBR is a semi-automatic AR-15 short-barreled rifle chambered in 223 Remington and 5.56x45mm NATO, designed for close-quarters use. It has a 10.3-inch barrel, a lightweight RIS III rail system with M-LOK attachment points, and a fully ambidextrous lower receiver with an ambidextrous charging handle.

The rifle weighs 5.7 pounds and measures 26.5 inches overall with a collapsible stock extended to 30 inches. It has a 1-in-7 rate of twist, a mid-length gas system, a 2-position thumb safety, and a 1/2x28 threaded barrel. It ships without sights and with a 32-round magazine. The finish is black anodized.

This is an NFA item classified as a short-barreled rifle. Class III dealers only, and all NFA regulations apply.

• Caliber: 223 Remington, 5.56x45mm NATO
• Barrel Length: 10.3 in
• Overall Length: 26.5 to 30 in
• Weight: 5.7 lb
• Capacity: 32 rounds (1 magazine included)
• Thread Pattern: 1/2x28
• Rate of Twist: 1-in-7
• Finish: Black anodized