M4 Upper Receiver Assembly No Handguards - LE6921 Upper Receiver 14.5 Barrel W/ BCG & Charging Handle
Click to see full view
Colt
Overview
The Colt M4 Upper Receiver Assembly is a complete unit designed for the AR-15 platform, featuring a 14.5-inch barrel that is optimized for a balance of maneuverability and ballistic performance. This assembly includes the upper receiver, bolt carrier group (BCG), and charging handle, ensuring that builders have all the essential components for a reliable operation right out of the box. This type of upper is commonly found in builds aimed for both tactical applications and lightweight configurations.
Specifications
M4 Upper Receiver Assembly No Handguards - LE6921 Upper Receiver 14.5 Barrel W/ BCG & Charging Handle
August 2026 on GunPartPicker
Colt M4 Upper Receiver Assembly No Handguards - LE6921 Upper Receiver 14.5 Barrel W/ BCG & Charging Handle ranked #291 of the 690 upper receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #223 of the 1,625 upper receivers builders have added.
It was out of stock everywhere we track for all of August 2026, and today none of the 3 retailers we track has it in stock right now. Listed prices start at $664.58 at BattleHawk Armory for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
Not sure which upper receiver to pick?
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the 7 builds that include this one
Colt M4 Commando 5.56mm Semi-Auto Lower Receiver Assembly With "LE" Prefix
GG&G Vertical Foregrip with Waterproof Storage
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Aero Precision AR-15 5.56 BCG W/C158 Bolt - Aero Logo - Phosphate
Geissele Automatics Airborne Charging Handle Black
Surefire M640DFT Dual Fuel Turbo Scout Light
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 2 →Builds in the community that include the M4 Upper Receiver Assembly No Handguards - Le6921 Upper Receiver 14.5 Barrel W/ Bcg & Charging Handle
| Build | Parts | Total |
|---|---|---|
 | 9 | $4431.55 |
 | 7 | $2331.91 |
No reviews yet. Be the first to review this product!