Davidson Defense Pharos 7.5-inch 1:16 10MM AR-15 Freefloat ML Handguard Pistol Complete Upper Build

Davidson Defense Pharos 7.5-inch 10MM AR-15 Complete Upper Build

This is a complete upper assembly built on the AR-15 platform, chambered in 10mm Auto. It includes the upper receiver, barrel, handguard, bolt carrier group, and charging handle. The freefloat M-LOK handguard runs 7 inches with a 1.77-inch internal diameter, and the 7.5-inch 4150 CrMoV barrel features a 1:16 twist rate optimized for 10mm performance. The A2-style flash hider threads at 9/16x24, and the nitride BCG cycles 10mm Auto and .40 S&W ammunition.

Key Features

• 7.5-inch 4150 CrMoV barrel with parkerized finish and 1:16 twist rate
• Freefloat M-LOK handguard with suppressor-ready design
• Billet upper receiver in 6061 aluminum
• Nitride bolt carrier group compatible with 10mm Auto and .40 S&W
• A2-style birdcage flash hider with 5/8-inch crush washer
• M4 contour profile with 9/16x24 muzzle threads

Perfect For

• 10mm pistol caliber carbine builds
• Shooters wanting blowback platform reliability
• Suppressed 10mm configurations
• M-LOK accessory mounting systems
• Compact PCC setups under 8 inches

Freefloat Handguard Design

The tubular aluminum handguard floats independently from the barrel, meaning the barrel doesn't contact the handguard at any point. This design reduces harmonics and supports consistent accuracy. The 7-inch length balances maneuverability with rail space for optics and accessories. M-LOK slots run the full length, allowing modular mounting without rail clutter.

10MM Auto Platform Considerations

This upper is purpose-built for 10mm Auto, which operates on a blowback system rather than direct impingement. The 7.5-inch barrel length and 1:16 twist rate are optimized for 10mm projectiles, which typically range from 135 to 180 grains. The bolt carrier group is specifically designed for 10mm cycling, and the barrel threads at 9/16x24 to match common 10mm suppressors and muzzle devices. The handguard's suppressor-ready design accommodates can-forward configurations without clearance issues.

Suppressor-Ready Configuration

The handguard interior diameter of 1.77 inches and the suppressor-ready design allow you to run a 10mm suppressor without the handguard interfering with the can. The A2 flash hider can be swapped for a direct-thread suppressor mount if your suppressor uses that attachment method. Verify your suppressor's thread pitch and mounting style before purchasing.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. BCG and charging handle are included with this complete upper. Lower receiver not included. Verify suppressor compatibility before use. Ensure secure mounting before operation.