6.8mm SPC II AR-15 Barrels

6.8mm SPC II AR-15 Barrels
6.8mm SPC II AR-15 Barrels. 
6.8 SPC II SS Bull Barrel 24 inch Length with 6.8SPC Bolt.
6.8 SPC II 16 HBAR Barrel with bolt
6.8 SPC II 20 HBAR Barrel with bolt