Rock River Arms 20in Predator HP Upper V2 Stainless Steel 243A0566BT. 243 Win 20" Ss Fluted Brl 1:10 Twist Bead Blasted Cryo TreatedOperator Brake 17" M-Lok Hndgrd Specifications for Rock River Arms 20in Predator HP Upper V2: Manufacturer: Rock River...