Home / Complete Uppers / Rock River Arms / Rock River Arms AR-15 Complete Upper Receiver 450 Bushmaster 16" Black Barrel
▼ 14% below avg
Rock River Arms AR-15 Complete Upper Receiver 450 Bushmaster 16" Black Barrel
Lowest Price
$567.29
MSRP
$750
Savings
24% off
Verified In Stock at
11 Stores
Updated
Aug 26, 2026
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(1) Magazine, (5) Rounds
.450 Bushmaster
1 Magazine
16 Inch Chrome Moly, 1:24 Twist
Bolt Carrier Group, Charging Handle Assembly
Low Profile Gas Block, Mid-Length Gas System
RRA 13 Inch Extended Lightweight Free Float Rail
RRA Operator Brake, 5/8-32 Thread
Specifications
Description
The Rock River Arms AR-15 Upper Receiver Assembly is designed to pin onto any mil-spec lower receiver. Just add an optic, or set of sights, and you are ready to send lead downrange! FeaturesIncludes one 5 round magazineFlattop upper receiverMil-spec compatibleAnodized finish
