Daniel Defense MK12 SPR 18″ 5.56 NATO Upper

The Daniel Defense MK12 SPR 18" upper is a complete AR-15 upper assembly configured for .223 REM/5.56 NATO. It comes finished in matte black and features a DDM4 12.0 rail with a rifle-length gas system. The barrel is threaded with a 1/2x28 pattern and designed to work with precision-oriented builds.

Key Specifications

• Caliber: .223 REM/5.56 NATO.
• Barrel length: 18".
• Rate of twist: 1-in-7".
• Rail: DDM4 12.0 Rail.
• Gas system: Rifle Length Gas System.
• Thread pattern: 1/2x28.
• Finish: Matte Black.
• Weight: 5.25 lbs..
• Length: 28.6.
• Sights: No Sights.

Designed for builders and shooters assembling precision-oriented AR-15 platforms, the MK12 SPR upper combines a stabilized rifle-length gas system and a 1-in-7" twist barrel with Daniel Defense's DDM4 rail for straightforward accessory integration. Its threaded barrel and matte-black finish make it suitable for use in a range of responsible, accuracy-focused applications where a robust, well-specified upper is required.