"Designed to bridge the gap between the short-range combat rifle and long-range precision rifle, the Daniel Defense DDM4 Mk12 Semi-Auto Rifle delivers accuracy out to 600 yards. The Mk12 is built around an 18"" heavier-profile, cold hammer-forged, stainless steel blend barrel and rifle-length gas system. The rifle-length gas system helps mitigate felt recoil, while the longer barrel helps you reach out farther than the standard carbine AR. The rifle utilizes Daniel's Mk12 gas block, which is built to Crane (Naval Surface Warfare Division) specifications for US Special Operations Command (SOCOM). The upper receiver is outfitted with a 12"" free-floating quad-rail handguard for optics and accessories and GRIP-N-RIP ambidextrous charging handle. The rifle comes with the Geissele SSA 2-stage trigger with 2.5-lb. take-up and crisp 2-lb. break. Machined 7075-T6 upper and lower receiver 18"" Mk12-profile (heavy), cold hammer-forged, stainless steel blend barrel Daniel Defense flash suppressor Rifle-length gas system Mk12 low-profile gas block 12"" free-floating quad-rail handguard Geissele SSA 2-stage trigger with 2.5-lb. take-up and crisp 2-lb. break GRIP-N-RIP ambidextrous charging handle Ambidextrous selector lever"