Home / Gun Parts / Rock River Arms / Rock River Arms AR-15 A4 Complete Upper Receiver 450 Bushmaster 20" Chrome Moly Barrel 15" Handguard Black

Rock River Arms AR-15 A4 Complete Upper Receiver 450 Bushmaster 20" Chrome Moly Barrel 15" Handguard Black

Rock River Arms AR-15 A4 Complete Upper Receiver 450 Bushmaster 20" Chrome Moly Barrel 15" Handguard Black

Lowest Listed Price

$704.99

MSRP

$704.99

Savings

See retailer

Retailers Reporting In Stock

0 Stores

Updated

Aug 26, 2026

Compare Deals from 2 Retailers

Sorted by lowest price

Specifications

Brand

Rock River Arms

MPN

450B0587

UPC

842834125531

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! FeaturesFlattop upper receiverMil-spec compatibleAnodized finish

Similar Products

Rock River Arms AR-15 Complete Upper Receiver 450 Bushmaster 16" Black Barrel - Rock River Arms

Rock River Arms

Rock River Arms AR-15 Complete Upper Receiver 450 Bushmaster 16" Black Barrel

● In Stock

Rock River Arms AR-15 Complete Upper Receiver 350 Legend 16" Black Barrel - Rock River Arms

Rock River Arms

Rock River Arms AR-15 Complete Upper Receiver 350 Legend 16" Black Barrel

● In Stock

Radian Weapons Model 1 10" Upper Receiver and Handguard Set, Flat Dark Earth - Radian Weapons

Radian Weapons Model 1 10" Upper Receiver and Handguard Set, Flat Dark Earth

● In Stock

Rock River Arms AR-15 Complete Upper Receiver 350 Legend 16" Stainless Barrel - Rock River Arms

Rock River Arms

Rock River Arms AR-15 Complete Upper Receiver 350 Legend 16" Stainless Barrel

$529.99 $684.53

● In Stock

Rock River Arms AR-15 CLB Complete Upper Receiver 458 SOCOM 16" Chrome Moly Barrel 13" M-LOK Handguard Black - Rock River Arms

Rock River Arms

Rock River Arms AR-15 CLB Complete Upper Receiver 458 SOCOM 16" Chrome Moly Barrel 13" M-LOK Handguard Black

$704.77 $835.99

● In Stock

Rock River Arms AR-15 Tactical Carbine Complete Upper Receiver 458 SOCOM 16" Chrome Moly Barrel 15" M-LOK Handguard Black - Rock River Arms

Rock River Arms

Rock River Arms AR-15 Tactical Carbine Complete Upper Receiver 458 SOCOM 16" Chrome Moly Barrel 15" M-LOK Handguard Black

● In Stock

Rock River Arms AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel - Rock River Arms

Rock River Arms

Rock River Arms AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel

● In Stock

Related Products

Dead Air KeyMo Adapter for HUB Based Silencers 1 3/8"-24 Steel Black - Dead Air

Dead Air KeyMo Adapter for HUB Based Silencers 1 3/8"-24 Steel Black

● In Stock

HUXWRX QD Flash Hider Suppressor Mount 5.56mm AR-15 1/2"-28 Thread Black - Huxwrx

HUXWRX QD Flash Hider Suppressor Mount 5.56mm AR-15 1/2"-28 Thread Black

● In Stock

SB Tactical SBA3 AR-15 Pistol Brace Black - Sb Tactical

SB Tactical SBA3 AR-15 Pistol Brace Black

● In Stock

SB Tactical SBA5 AR-15 Pistol Brace Black - Sb Tactical

SB Tactical SBA5 AR-15 Pistol Brace Black

● In Stock

Glock Performance Flat Faced Trigger with End Plate 9mm - Glock

Glock Performance Flat Faced Trigger with End Plate 9mm

● In Stock

UTG Pro Leapers Receiver Extension Tube Mil-Spec 6 Position For AR-15 - Leapers

UTG Pro Leapers Receiver Extension Tube Mil-Spec 6 Position For AR-15

● In Stock

Leapers Utg Low Profile Flip Up Front Sight Aluminum Black

● In Stock

Related Searches

Rock River Arms deals Gun Parts