Daniel Defense | MK12 SPR 18in 5.56 NATO | DDM4 12in Rail

The Daniel Defense MK12 SPR 18″ upper is a complete AR-15 upper assembly built for use with .223 Rem/5.56 NATO. It pairs an 18-inch barrel with a 1-in-7 rate of twist and a DDM4 12.0 rail, and features a rifle-length gas system and a GRIP-N-RIP charging handle. This configuration is suited to precision-oriented shooting and designated marksman roles where a longer barrel and rifle-length gas system are preferred.

Product Specifications

• The manufacturer is Daniel Defense.
• The model is listed as MK12 SPR.
• The caliber/cartridge is .223 REM/5.56 NATO.
• The barrel measures 18 inches.
• The rate of twist is 1-in-7.
• The rail included is the DDM4 12.0 Rail.
• The gas system is a Rifle Length Gas System.
• The charging handle feature is GRIP-N-RIP Charging Handle.
• The product type is Accessory-Uppers.
• The finish is Matte Black in Black color.
• The upper is supplied with No Sights.
• The NFA thread pattern is 1/2×28.
• The listed weight is 5.25 lbs..
• The country of origin is US.
• The UPC is 815604016735.

This complete MK12 SPR upper combines a long barrel and a rifle-length gas system with Daniel Defense’s DDM4 rail to deliver a stable platform for longer-range and precision-centric use. Its configuration makes it a straightforward choice for shooters seeking an upper built for accuracy potential and reliable gas operation.