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AR-STONER AR-15 A3 Upper Receiver Assembly 6.5 Grendel 16″ Barrel 15″ Ultralight M-LOK Handguard



Product Information

Cartridge 6.5 Grendel
Color Black
Finish Anodized
Material Aluminum
Weight 4.8 Pound
Barrel Length 16 Inches
Twist 1:8 Inches
Threads 5/8″-24
Barrel Contour Heavy
Barrel Finish Parkerized
Chrome Lined No
Gas Block Diameter 0.75 Inches
Gas System Length Carbine
M4 Feed Ramps Yes
Upper Receiver Type A3 Flat-Top
Barrel Material 4150 Chrome Moly Vanadium Steel
Handguard 15″ Ultralight M-LOK
Bolt Carrier Assembly Included Yes
Muzzle Device Flash Hider
Mil-Spec or Commercial Mil-Spec
Country of Origin United States of America
Compatible With

Delivery Information

Shipping Weight

5.785 Pounds

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 16″ 4150 chrome moly steel, heavy contour barrel with 1:8 twist. The A3 upper attaches to virtually any standard AR-15 lower receiver. Additional features include a carbine-length gas system, flash hider, and an Ultralight 15” free float M-Lok Handguard. The handguard features 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″ Ultralight M-Lok Handguard
  • 16” 4150 Chrome Moly Steel
  • Flash Hider
  • Charging Handle


Made In United States of America

WARNING: Cancer and Reproductive Harm –


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