Colt

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 LE6943 Upper Group 11.5in With BCG And Sights

Colt M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6943 Upper Group 11.5in With Bcg And Sights - Upper Receiver for AR-15 - view 1
Colt M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6943 Upper Group 11.5in With Bcg And Sights - Upper Receiver for AR-15 - view 2
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Colt

Overview

The Colt M4 5.56 Complete Monolithic Upper Receiver Group features an 11.5-inch barrel, making it well-suited for compact builds while maintaining effective performance with 5.56 NATO ammunition. As a complete assembly, it includes the upper receiver and necessary components, streamlining installation and ensuring compatibility with AR-15 platforms. This upper is commonly found in short-barreled rifle builds aimed at close-quarters applications.

Specifications

MPNLE6943CK
PlatformAR-15
Caliber5.56 NATO
AssemblyComplete
Barrel Length11.5
Receiver TypeM4

Available Merchants(4)

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BattleHawk Armory logo
BattleHawk Armory
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$1,063
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KY Gun Company
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$1,185
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Optics Planet
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$1,249
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Brownells
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$1,215
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Build history on GunPartPicker

Builders on GunPartPicker first added the Colt M4 5.56 Complete Monolithic Upper Receiver Groups - M4 LE6943 Upper Group 11.5in With BCG And Sights to a build in September 2026.

It was in stock most days in August 2026, and today 3 of the 4 retailers we track have it in stock. Prices barely moved in August 2026, holding around $1,202.99, so there haven't been real sales lately. Buying today, the lowest price is $1,063.48 at BattleHawk Armory, which matches the best price we saw in August.

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