Rock River Arms Rock River Arms Tactical Carbine Complete Upper Receiver 450 Bushmaster Rock River Arms A4 mid-length upper comes chambered in .450 Bushmaster with a 16" chrome moly 1/24 twist barrel.
Additionally this upper includes a RRA 13" M-Lok compatible lightweight free float rail and a RRA Operator Brake (5/8-32 thread).
This is a complete upper with bolt carrier group, charging handle assembly and a 5 round magazine.
Features: 16 Inch Chrome Moly, 1:24 Twist RRA Operator Brake, 5/8-32 Thread Low Profile Gas Block, Mid-Length Gas System RRA 13 Inch Extended Lightweight Free Float Rail Bolt Carrier Group, Charging Handle Assembly
Specifications
ManufacturerRock River Arms
Caliber.450 BUSHMASTER
Capacity5 rounds
Barrel Length16 in
FinishAnodized
Weight6.44 lb
Shipping & FFL
This item ships directly from the selling dealer to your door. No FFL transfer is
required for this product.
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