"The Daniel Defense M4A1 AR-15 Rifle is an immediately recognizable AR-15 platform with a large amount of community respect due to its construction of hard-use, true mil-spec parts. With the success of earning government contracts with US SOCOM, the Daniel Defense M4A1 AR-15 Rifle is a favorite for many shooters. The direct impingement gas system features a low-profile gas block and carbine-length gas tube. The 14.5"" barrel features a pinned and welded flash hider, bringing the barrel up to legal length. The DD RIS (Rail Interface System) II Picatinny quad rail handguard is CNC machined from 6061-T6 aluminum and finished in type 3 hard coat anodizing. The receiver group is machined from 7075-T6 aluminum. The M16 bolt carrier group is MP tested, chrome lined, and featured a properly staked gas key. Engineered for suppressed fire, the DD GRIP-N-RIP charging handle redirects gases away from the user's face. The Daniel Defense rubber overmolded grip is a nice touch and pairs well with their rubber rail-panel covers and overmolded stock, both of which are included. DD is a well-trusted brand with combat-grade, quality components. The extra confidence that comes with the name makes it a nice addition as combat effective platform to your collection. DD's take on the M4A1 AR-15 Rifle Carbine-length direct impingement gas system 14.5"" barrel with pinned and welded flash hider DD RIS II Picatinny quad rail DD collapsible stock M16 BCG DD GRIP-N-RIP charging handle Rubber overmolded pistol grip Rubber rail panel covers"