M4 Upper Receiver Assembly No Handguards - LE6921 Upper Receiver 14.5 Barrel W/ BCG & Charging Handle
All Colt upper receivers
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
Build history on GunPartPicker
Builders have added the Colt M4 Upper Receiver Assembly No Handguards - LE6921 Upper Receiver 14.5 Barrel W/ BCG & Charging Handle to their builds on GunPartPicker. Since April 2026, it ranks #336 of the 2,024 upper receivers builders have added.
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 $664.58 at BattleHawk Armory for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 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 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 Airborne Charging Handle Black
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Aero Precision AR-15 5.56 BCG W/C158 Bolt - Aero Logo - Phosphate
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 builds →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 | $4459.55 |
 | 7 | $2307.16 |
No reviews yet. Be the first to review this product!