M4 5.56 Complete Monolithic Upper Receiver Groups - M4 LE6945 Upper Group 10.3in Stripped

Name: Colt M4 5.56 Complete Monolithic Upper Receiver Groups - M4 LE6945 Upper Group 10.3in Stripped
Brand: Colt
SKU: SP400458
Price: 839.99 USD
Availability: OutOfStock

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Colt M4 5.56 Complete Monolithic Upper Receiver Groups - M4 LE6945 Upper Group 10.3in Stripped - view 1

Colt M4 5.56 Complete Monolithic Upper Receiver Groups - M4 LE6945 Upper Group 10.3in Stripped

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Overview

The Colt M4 5.56 Complete Monolithic Upper Receiver Group features a 10.3-inch barrel and is designed to fit the AR-15 platform, making it a compact and versatile option for various applications. This complete assembly allows builders to easily attach it to their lower receiver, providing a streamlined setup perfect for quick handling and maneuverability. This upper is often found in short-barreled rifle builds and setups intended for close-quarters engagements.

Specifications

MPNSP400458

Receiver TypeM4

PlatformAR-15

AssemblyComplete

Caliber5.56 NATO

Barrel Length10.3

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M4 5.56 Complete Monolithic Upper Receiver Groups - M4 LE6945 Upper Group 10.3in Stripped

Available Merchants(1)

Prices checked Oct 11, 2026

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$840

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Price and stock

The Colt M4 5.56 Complete Monolithic Upper Receiver Groups - M4 LE6945 Upper Group 10.3in Stripped was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $839.99 at Brownells for when it comes back.

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Prices checked Oct 11, 2026 · refreshed daily across 37 retailers