Davidson Defense Terminus 20-inch Rifle-Gas 1:8 6.5 Creedmoor AR-10 M-Lok Rifle Complete Upper Build

Terminus 20-Inch Rifle-Gas 1:8 6.5 Creedmoor AR-10 M-Lok Rifle Complete Upper Build

This is a precision 6.5 Creedmoor upper receiver assembly built on the DPMS low-profile pattern. It features a 20-inch heavy profile 4150 CrMoV barrel with 1:8 twist rate, rifle-length gas system, and a 17-inch M-Lok freefloat handguard. The upper receiver is Type III hardcoat black anodized billet aluminum. Bolt carrier group and charging handle are included. Lower receiver is not included.

Key Features

• 20-inch heavy profile 4150 CrMoV barrel with 1:8 twist rate for 6.5 Creedmoor
• DPMS low-profile billet upper receiver with Type III hardcoat black anodized finish
• 17-inch freefloat M-Lok handguard with quad-rail front section
• Ambidextrous QD attachment points on handguard
• Recoil Technologies LR-308 nitride bolt carrier group
• Rifle-length stainless steel gas tube with low-profile gas block
• LR-308 aluminum charging handle included
• GI-style birdcage flash hider with crush washer

Perfect For

• Long-range precision shooters building 6.5 Creedmoor AR-10 platforms
• Hunters requiring flat-shooting rifle configurations
• Shooters upgrading from 308 Winchester to higher-ballistic-coefficient rounds
• Builders selecting components for custom LR-308 builds

Precision Long-Range Platform

The 1:8 twist rate is optimized for modern 6.5 Creedmoor ammunition, stabilizing heavier projectiles from 130 to 156 grains. The 20-inch barrel length balances velocity and handling for field applications. Rifle-length gas system tuning provides reliable cycling with standard 6.5 Creedmoor loads while reducing felt recoil compared to shorter configurations.

Freefloat Handguard Design

The 17-inch M-Lok handguard isolates the barrel from contact with the upper receiver, eliminating harmonic interference that affects accuracy. Quad-rail front section provides mounting flexibility for accessories. Slanted front design reduces weight without sacrificing accessory mounting options. Ambidextrous QD points support sling attachment and quick-detach systems.

DPMS Low-Profile Configuration

This upper receiver follows DPMS low-profile dimensions, making it compatible with most LR-308 lower receivers and components. The billet aluminum construction provides structural rigidity. Type III hardcoat anodizing offers corrosion resistance and durability for field use.

Bolt Carrier Group Compatibility

The Recoil Technologies LR-308 bolt carrier group is cross-compatible with 308 Winchester, 6.5 Creedmoor, and 243 Winchester platforms. Nitride finish provides corrosion resistance and extended component life. The 0.936-inch gas journal diameter matches the included low-profile gas block for reliable operation.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. BCG and charging handle are not included.