Diamondback 18" Medium Profile 6.5 Grendel Barrel - Mid-Length Gas

Diamondback 18" Medium Profile 6.5 Grendel Barrel - Mid-Length Gas

Unlock the full potential of your AR-15 with the Diamondback 18" 6.5 Grendel barrel—engineered for shooters who demand accuracy, durability, and value. Built from rugged 4150 steel and finished in corrosion-resistant black nitride, this medium-contour barrel is designed to deliver consistent performance shot after shot. The 6.5 Grendel chambering offers superior ballistic efficiency and extended range, making it ideal for hunting, competition, or tactical builds.

Featuring button-rifled 5-groove bore geometry and an 11° target crown, this barrel enhances precision and minimizes bullet deformation. With a mid-length gas system and standard 5/8x24 threading, it’s ready for your favorite muzzle device or suppressor. Whether you're a home gunsmith or a serious AR builder, Diamondback delivers premium quality at an unbeatable value.

6.5 Grendel Chambering
Optimized for long-range accuracy and superior ballistic performance.

Medium Contour Profile
Balances rigidity and weight for consistent precision without excess bulk.

4150 Steel Construction
Delivers strength and heat resistance for high-volume shooting.

Black Nitride Finish
Provides corrosion resistance and a sleek, low-maintenance surface.

Button-Rifled 5-Groove Bore
Enhances accuracy and reduces fouling for cleaner shooting.

11° Target Crown
Improves bullet exit consistency for tighter shot groups.

Mid-Length Gas System
Offers smoother recoil impulse and reliable cycling.

Standard 5/8x24 Threading
Compatible with a wide range of muzzle devices and suppressors.

TYPE 1 Bolt Compatibility
Designed for use with 7.62x39 BCGs for proper headspacing.

Specifications

• Chamber: 6.5 Grendel
• Barrel Length: 18 inches
• Contour/Profile: Medium
• Material: 4150 Steel
• Twist Rate: 1:8
• Thread Pitch: 5/8 × 24
• Rifling: Button Rifled, 5-Groove Bore
• Crown: 11° Target Crown
• Gas System: Mid-Length
• Gas Block Journal: .750 inches
• Coating: Black Nitride