AR-STONER AR-15 A3 Upper Receiver Assembly 6.5 Grendel 20" Barrel with 15" Standard M-Lok Handguard

  • Product #: 509828
  • AR-Stoner #: UA65RHB2018(SSF)-(15)MLOKMW
AR-STONER AR-15 A3 Upper Receiver Assembly 6.5 Grendel 20" Barrel with 15" Standard M-L...
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Ships today from MidwayUSA
Made in USA

Product Overview

This powerful AR-STONER™ A3 Upper Receiver Assembly in 6.5 Grendel is designed to provide all the function, style and affordability for today’s modern sporting rifle shooter. It features a fluted 20" 416R stainless steel, heavy contour barrel with 1:8 twist. The A3 upper attaches to virtually any standard AR-15 lower receiver. Additional features include a rifle-length gas system, 5R rifling, stainless steel M2 flash hider, and a lightweight 15” free float M-Lok Handguard. The handguard features integrated QD sling mounts with a sleek design while maintaining strength and ergonomics. Finish building the gun of your dreams with this AR-STONER™ AR-15 A3 Upper Receiver Assembly in 6.5 Grendel.


  • Complete Bolt Carrier Group
  • 15" M-Lok Handguard
  • 20” 416R Stainless Steel Barrel
  • M2 Flash Hider
  • Chambered in 6.5 Grendel


  • Uses a Type 2 bolt with .136" bolt face depth
  • Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.


Made In United States of America
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Delivery Information

Must Ship to FFL Dealer
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DOT- Regulated
Carrier Restrictions
  • Cannot ship via air
  • Cannot ship via USPS
  • Cannot ship to PO Box
  • Must ship to Contiguous US
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