The Daniel Defense MK12 is a high-precision AR-15 style rifle designed for exceptional accuracy and durability. Chambered in 5.56x45mm NATO, the MK12 can utilize both 5.56x45mm NATO and .223 Remington ammunition. It features an 18" Cold Hammer Forged stainless steel barrel with a 1:7 twist rate, finished with a durable DLC coating. This barrel is engineered for precise chamber and bore alignment, contributing to the rifle’s superior accuracy. The MK12 incorporates a rifle-length direct impingement gas system with a MK12 gas block, built to Crane (Naval Surface Warfare Division) Specifications for USSOCOM, ensuring reliable performance. The rifle also includes a Daniel Defense Improved Flash Suppressor, designed to reduce muzzle flash and enhance shooting accuracy. The MK12 is equipped with a 12" free-floating Picatinny quad rail handguard, providing ample space for optics and accessories. It features the GRIP-N-RIP ambidextrous charging handle, accommodating both left- and right-handed shooters. The rifle is fitted with a Geissele SSA 2-Stage Trigger for precise fire control. Constructed from CNC-machined 7075-T6 aluminum, the upper and lower receivers are Mil-Spec, while the H buffer and a properly staked gas key enhance cycling and reliability. Additional features include a Mil-Spec buttstock and pistol grip, along with heat-resistant Santoprene rail panels. The MK12 is proudly made in the USA, combining top-tier craftsmanship with advanced performance.