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

  • Product #: 952310
  • AR-Stoner #: UA6.5RHB2018(SSF)-(15)MLOKARS
AR-STONER AR-15 A3 Upper Receiver Assembly 6.5 Grendel 20" Barrel with 15" M-Lok Handguard
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Out of Stock, Backorder OK
Est. In-Stock: Overdue
Made in USA

Product Overview

1 Year MidwayUSA Exclusive Brand Warranty

MidwayUSA Exclusive Brand Warranty

This powerful AR-STONER™ A3 Upper Receiver Assembly in 6.5 Grendel is designed to meet Customer's needs. This AR-STONER™ 6.5 Upper Assembly provides function, style and affordability for today’s modern sporting rifle shooter. The A3 upper attaches to virtually any standard AR-15 lower receiver. This 6.5 Grendel upper features a fluted 20" 416R stainless steel, heavy contour barrel with 1:8 twist. It also also features a rifle-length gas system, 5R rifling, stainless steel M2 flash hider, and a lightweight 15” free float M-Lok Handguard. M-Lok Handguard slots allow mounting of popular M-Lok compatible accessories directly to precision cutouts. The handguard also features integrated QD sling mounts with a sleek design while maintaining strength and ergonomics. Finish building the gun of your dreams that has downrange power 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


Note: 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 Yes
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Ships Alone Yes
Oversized Yes
DOT- Regulated Yes
Carrier Restrictions
  • Cannot ship via air
  • Cannot ship via USPS
  • Cannot ship to PO Box
  • Must ship to Contiguous US
HazMat Product Yes

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