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AR-STONER AR-15 Side Charging Upper Receiver Assembly 6.5 Grendel 20″ Barrel 15″ M-LOK Ultralight Handguard



Product Information

Color Black
Finish Anodized
Material Aluminum
Weight 5 Pound
Barrel Length 20 Inches
Twist 1:8 Inches
Threads 5/8″-24
Barrel Contour Heavy
Barrel Finish Stainless
Chrome Lined No
Gas Block Diameter 0.75 Inches
Gas System Length Rifle
M4 Feed Ramps Yes
Upper Receiver Type Side Charging
Barrel Material Stainless Steel
Handguard 15″ M-Lok Ultralight
Bolt Carrier Assembly Included Yes
Muzzle Device Flash Hider
Country of Origin United States of America

Delivery Information

Shipping Weight

6.770 Pounds

Product Overview

The AR-STONER AR-15 Side Charging Upper Receiver assembly chambered in 6.5 Grendel delivers precision accuracy at an affordable price. The machined billet aluminum upper receiver is combined with an extruded aluminum free float M-LOK handguard and both are Type III hard coat anodized.

This complete upper features a rifle-length gas system, a mil-spec bolt carrier group, 20” heavy-profile barrel with a matte finish and a lightweight 15” free float AR-Stoner M-LOK handguard and a flash hider.

Use the precision M-LOK cutouts at the three, six, and nine o’clock positions for mounting MIL-STD 1913 Picatinny rails or other direct-attach M-LOK accessories.


  • Side Charging Upper
  • Chambered in 6.5 Grendel
  • 20″ heavy-profile barrel

Made In United States of America

WARNING: Cancer and Reproductive Harm –


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