The LaRue Tactical Stealth M4 Upper Receiver is a high quality base for your next upper build. This forged 7075-T6 MIL-SPEC upper receiver is pre-assembeled with forward assist and and ejection port cover to remove some tedious steps from your build. The T-marked top rail makes consistent location of your favorite optics a breeze. With a hardcoat anodized finish, the Stealth M4 Assembled Upper is a quality choice for any AR-15 build.