R0398 17" FDE The RadianA(R) MODEL 1(TM) UPPER RECEIVER & HAND GUARD are precision CNC machined as a matching set, structurally reinforced in critical areas for improved strength and rigidity. The upper receiver is cut from billet 7075-T6 aluminum and assembled with dust cover, hand guard anti-rotation pin, light weight forward assist, and RAPTOR-SD(TM) Ambidextrous Charging Handle. The hand guard features MagpulA(R) M-LOKA(R) accessory mounting slots that attach to the barrel nut using four steel cross bolts treated in black nitride for corrosion resistance. Every surface has been smoothed over and blended to ensure no uncomfortable, sharp edges can be found. The upper and hand guard are then sprayed with RadianA(R) Cerakote options for a perfectly matching finish. What's in the Box: 1x Billet Upper Receiver w/Dust Cover, Anti-Rotation Pin & Light Weight Forward Assist Installed 1x Hand Guard w/Magpul M-LOKA(R) Modular Attachment Interface 1x Radian AX556 Lower Receiver 1x Raptor-SD Ambidextrous Charging Handle 1x Radian Talon 45/90 Ambidextrous Safety Selector 1x Ambidextrous Bolt Catch & Release 1x Ambidextrous Magazine Release 1x Enhanced Takedown Pin Set 1x Aluminum Barrel Nut 1x Barrel Nut Wrench 4x Hand Guard Cross Bolts, Washers & Nuts