FAXON Firearms URSSB556 ARAK-21 Complete Upper 5.56 Black
All Faxon Firearms upper receivers
Click to see full view
Faxon Firearms
Overview
The Faxon Firearms URSSB556 ARAK-21 Complete Upper is a fully assembled upper receiver designed for the AR-15 platform, chambered in 5.56 NATO. This complete upper simplifies the building process, allowing builders to quickly attach it to their lower receiver and get started with their shooting experience. It commonly appears in versatile builds that prioritize reliability and performance in a variety of shooting scenarios.
Specifications
FAXON Firearms URSSB556 ARAK-21 Complete Upper 5.56 Black
Available Merchants(5)
Prices checked
Price Alert
Build history on GunPartPicker
Builders on GunPartPicker first added the FAXON Firearms URSSB556 ARAK-21 Complete Upper 5.56 Black to a build in March 2026.
It was hard to find in September 2026, in stock on only 8 of the 28 days we checked, and today only KY Gun Company has it in stock. Prices barely moved in September 2026, holding around $919.08, so there haven't been real sales lately. Buying today, the lowest price is $919.08 at KY Gun Company, which matches the best price we saw in September.
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
Popular alongside upper receivers on GunPartPicker
Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Bravo Company M16 Bolt Carrier Group Black
Magpul AFG-2 Angled Fore Grip - Black
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
No reviews yet. Be the first to review this product!