Moriarti AR-10 6.5 Creedmoor 12.5" Pistol Upper – Pistol Gas, 1:8 Twist, 12" M-LOK

12.5" 6.5 Creedmoor Pistol Upper: Specs & Features

Master your next AR‑10 build with the Moriarti Arms 12.5" 6.5 Creedmoor Complete Upper Receiver Assembly—engineered for shooters who demand compact maneuverability without sacrificing Creedmoor ballistic performance. Featuring a precision 12.5" 4150 CMV barrel with a 1:8 twist and a pistol‑length gas system, this upper delivers smooth cycling, excellent pressure management, and optimized accuracy with modern 6.5CM loads.

The billet 6000‑series aluminum receiver ensures rigidity and long‑term durability, while the 12" M‑LOK free‑float handguard provides superior accessory mounting options and enhanced heat dissipation. Suppressor‑friendly and DPMS‑pattern compatible, this upper is built for tactical applications, hunting, and high‑performance pistol configurations.

Whether you’re completing a compact Creedmoor pistol or building a close‑range precision hammer, this upper combines Moriarti quality, reliability, and proven AR‑10 engineering.

Key Features

• 12.5" 6.5 Creedmoor Barrel for compact but powerful ballistic output
• 1:8 Twist Rate for optimal stabilization with modern 6.5CM bullets
• 4150 CMV Barrel with QPQ Nitride Finish for superior barrel life and corrosion resistance
• Pistol‑Length Gas System ensures reliable cycling and suppressor‑ready performance
• Billet 6000‑Series A3 Upper Receiver with hardcoat anodizing
• 12" M‑LOK Free‑Float Rail by Moriarti Arms for lightweight strength and accessory flexibility
• 5/8x24 Threaded Muzzle, ready for brakes, comps, or suppressors
• DPMS‑Pattern Compatibility, works with standard AR‑10 BCG and charging handle

Specifications

• Caliber: 6.5 Creedmoor
• Barrel Length: 12.5"
• Twist Rate: 1:8
• Barrel Material: 4150 Chrome Moly Vanadium
• Finish: QPQ Nitride
• Gas System: Pistol‑Length
• Gas Block: .750 Low‑Profile
• Muzzle Threads: 5/8x24
• Upper Receiver: Billet 6000‑Series Aluminum, Hardcoat Anodized
• Handguard: 12" M‑LOK Moriarti Free‑Float
• Compatibility: AR‑10 DPMS‑pattern lowers, standard 6.5CM BCG & CH

Note: MLOK rail design may vary depending on inventory; quality remains identical.

Images may not be an exact representation of the product.

FAQ

What lower receiver does this upper fit?

It is built for DPMS-pattern (LR-308 style) AR-10 lower receivers and works with a standard AR-10 BCG and charging handle. Check your lower's pattern before ordering, since large-frame AR dimensions are not fully standardized.

Is it suppressor friendly?

Yes. The 5/8x24 threaded muzzle and pistol-length gas system suit a suppressor or brake.

What twist rate does it use?

1:8, stabilizing modern 6.5 Creedmoor bullets from the 12.5" barrel.

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