Colt

M4 5.56 Upper Receiver Groups - M4 LE6920 Upper Group 16in With BCG And Sights

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Colt M4 5.56 Upper Receiver Groups - M4 Le6920 Upper Group 16in With Bcg And Sights - Upper Receiver for AR-15 - view 1
Colt M4 5.56 Upper Receiver Groups - M4 Le6920 Upper Group 16in With Bcg And Sights - Upper Receiver for AR-15 - view 2
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Colt

Overview

The Colt M4 LE6920 Upper Receiver Group is a complete assembly designed for the AR-15 platform, featuring a 16-inch barrel chambered in 5.56 NATO. This upper receiver group is engineered for reliability and performance, providing the builder with a ready-to-install option that includes a bolt carrier group and sights. Commonly found in builds focused on the 5.56 NATO caliber, it is an excellent choice for those looking to create a versatile and dependable rifle.

Specifications

MPNLE6920CK
PlatformAR-15
Barrel Length16
AssemblyComplete
Caliber5.56 NATO
Receiver TypeM4

Available Merchants(6)

Prices checked

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KY Gun Company logo
KY Gun Company
Flat rate shipping
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In Stock
$665
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Palmetto State Armory logo
Palmetto State Armory
Free shipping
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$739
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Optics Planet logo
Optics Planet
Free shipping
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$748
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Brownells logo
Brownells
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$749
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BattleHawk Armory logo
BattleHawk Armory
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Out of Stock
$642
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Classic Firearms logo
Classic Firearms
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Out of Stock
$687
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Build history on GunPartPicker

Builders on GunPartPicker first added the Colt M4 5.56 Upper Receiver Groups - M4 LE6920 Upper Group 16in With BCG And Sights to a build in February 2026.

It was in stock most days in September 2026, and today 4 of the 6 retailers we track have it in stock. It dipped to $642.47 at BattleHawk Armory for a stretch in September 2026, under its usual $687.18 to $749, so sales do come around. Buying today, the lowest price is $664.96 at KY Gun Company.

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Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Gas System

50.3%
Mid-Length50.3%
Carbine25.7%
Pistol11.4%
Rifle11%
Blowback1.3%
Other0.3%

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