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6.5 Grendel 18″ Light Barrel

6.5 Grendel 18″ Light Barrel


Barrel Exterior Diameters (inches)
Under handguard 0.845
Gas block 0.875
In front of gas block 0.725
At muzzle 0.700

This Alexander Arms® 6.5 Grendel barrel is fully-inspected by Alexander Arms® for proper chamber, bore, gas port, and all other critical dimensions. This product carries our standard one-year limited warranty against factory defects of the parts being sold.  Warranty does not cover the final functionality of the rifle built with this barrel. Because of the advanced nature of firearms assembly and the possibility of physical harm to a user, it is expected that the assembler of this barrel has adequate technical knowledge of firearms assembly.

SKU: B-65-18L-B Category:

Lightweight profile, button-rifled, stainless steel 6.5 Grendel barrel


- 1:8 twist rate
- Glass bead blasted
- Fluting for weight reduction
- 5/8-24 TPI RH muzzle threading
- 60-degree muzzle crown
- Barrel extension installed*
- Gas port is positioned at mid-length
- Fully-inspected and fully-prepared for assembly into an AR-15 platform rifle
- Barrel weight is 2.10 pounds
- Gas block diameter is 0.875 inches

Specifications are not optional and custom barrels are not made

Please review the warranty disclaimer in the Additional Info section before ordering
*The barrel extension adds to the total length of the barrel, making it longer than 18"


Additional information

Weight 2.5 lbs
Dimensions 16 × 1 × 1 in


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