Davidson Defense Chrome Arc 16-inch Carbine-Gas 1:8 338 ARC AR-15 M-Lok Rifle Complete Upper Build

Chrome Arc 16-inch Carbine-Gas 1:8 338 ARC AR-15 M-Lok Rifle Complete Upper Build

This Davidson Defense complete upper delivers a modern 338 ARC platform built on proven AR-15 architecture. The 16-inch 4150 CrMoV barrel with 1:8 twist rate stabilizes heavier projectiles while the carbine-length gas system keeps the profile compact and maneuverable. The 7075-T6 upper receiver pairs with a 15-inch free-float M-Lok handguard finished in black chrome, offering a lightweight platform with full-length monolithic Picatinny rail integration for optic mounting and accessory flexibility.

Key Features

• 16-inch 4150 CrMoV barrel, parkerized finish, 1:8 twist rate for 338 ARC
• 7075-T6 aluminum upper receiver with anodized finish and M4 feed ramps
• 15-inch free-float M-Lok handguard with full-length monolithic Picatinny rail
• Carbine-length stainless steel gas tube with micro low-profile gas block
• AR-15 6.5 Grendel II bolt carrier group with QPQ nitride finish
• GI-style birdcage flash hider with 5/8x24 thread pitch and crush washer included
• Forward assist assembly and ejection port door hardware included
• Mil-spec M4 charging handle included

Perfect For

• 338 ARC shooters building a compact rifle platform
• Shooters seeking a lightweight, maneuverable mid-range carbine
• Builders who want factory-matched components and reliability
• Precision and distance shooting with modern ergonomics

338 ARC Platform Performance

The 338 ARC cartridge sits between intermediate and full-power rifle rounds, offering ballistic advantages in a compact AR-15 package. This upper combines a 1:8 twist barrel optimized for 338 ARC projectile weights with a carbine gas system that reduces felt recoil and keeps the overall rifle length manageable. The free-float handguard design isolates barrel harmonics from external pressure, supporting consistent shot placement across typical engagement distances.

Free-Float Handguard and Accessory Mounting

The 15-inch M-Lok handguard features a full-length monolithic Picatinny rail on top, allowing direct optic mounting without additional adapters. M-Lok slots along the sides and bottom provide secure, repeatable mounting points for lights, lasers, grips, and other tactical accessories. The black chrome finish resists corrosion while maintaining a professional appearance. The free-float design means the barrel never contacts the handguard, eliminating a common source of accuracy variation.

Barrel and Gas System Specifications

The 16-inch 4150 CrMoV barrel delivers velocity appropriate for 338 ARC loads while maintaining a compact sight radius. Parkerized finish protects against corrosion in field conditions. The carbine-length gas system cycles reliably with standard 338 ARC ammunition and reduces bolt carrier velocity compared to mid-length or rifle-length systems, extending component life and reducing wear. The micro low-profile gas block sits low on the barrel, preserving sight line clearance and reducing snag points.

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