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Colt
Overview
The Colt M4 LE6933ERP Upper Group is a complete upper receiver designed for the AR-15 platform, featuring an 11.5-inch carbine contour barrel chambered in 5.56 NATO. Its carbine-length gas system ensures reliable cycling and performance, while the 1:7 twist rate stabilizes a range of bullet weights, making it versatile for various ammunition types. This upper is commonly found in builds focused on compactness and maneuverability, often used for tactical applications or close-quarters engagements.
Specifications
Build history on GunPartPicker
Builders have added the Colt M4 LE6933ERP Upper Group 11.5in With BCG to their builds on GunPartPicker. Since April 2026, it ranks #862 of the 2,047 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO, nearly all on carbine-length gas, and nearly all AR-15.
It was out of stock everywhere we track every time we checked in October 2026, and today none of the 3 retailers we track has it in stock right now. Listed prices start at $939.28 at BattleHawk Armory for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Colt M4 Commando 5.56mm Semi-Auto Lower Receiver Assembly With "LE" Prefix
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
Colt 5.56 NATO M16 / AR-15 Bolt Carrier Group
Colt M4/M4A1 Replacement Barrel Stripped 14.5in
CMC Triggers Two Stage Trigger Curved 2lb Set 3lb Release
True North Concepts Aluminum M-LOK GripStop - Olive Drab
Builds Featuring This Part
See all builds →Builds in the community that include the Colt M4 Le6933erp Upper Group 11.5in With Bcg
| Build | Parts | Total |
|---|---|---|
 | 20 | $2129.26 |
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