Alexander Arms UST-17ST Upper Receiver AR15 18\" S/S Fluted w/KIT
Click to see full view
Alexander Arms
Overview
The Alexander Arms UST-17ST Upper Receiver is a complete assembly designed for the AR-15 platform, featuring an 18-inch barrel optimized for 5.56 NATO ammunition. The mid-length gas system enhances reliability and reduces recoil, making it suitable for a variety of shooting applications. This upper receiver is commonly found in precision-oriented builds that prioritize accuracy and performance at extended ranges.
Specifications
Price and stock
The Alexander Arms UST-17ST Upper Receiver AR15 18\" S/S Fluted w/KIT was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $940.26 at BattleHawk Armory for when it comes back.
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!