This is a complete.300 Blackout Upper kit with a 7" Slim Rail and 7.5" Phosphate Barrel The parts included are below:
- AR-15 M4 Upper Receiver
- 7.5" 300 Blackout Barrel
- Thread size: 5/8 x 24
- 7" slim Rail Hand Guard
- Gas Tube, and low pro gas block
- Ejection Port Cover
- Charging Handle
- Forward Assist
- Flash Suppressor with Crush Washer
- M-16 Bolt Carrier Group
