Lo Drag Upper Receiver - AR15 The Luth-AR Lo-Drag upper receiver is made from 6061-T6 Aluminum. Designed to be lightweight, without a forward assist, shell deflector or dust cover. Specifications: 6061-T6 Aluminum Hard coat anodized black Thick wall for added strength Picatinny top rail *Note: Due to the lo-profile design, the Lo-Drag(TM) upper receiver is not compatible with the Luth-AR Palm Handguard(TM) or the Luth-AR Widebody Hand Guard(TM) at this time. Mfg: Luth-Ar