Details
Davidson Defense Falas (Suppressor Ready) 16.5-Inch AR-15 5.56 NATO Rifle Upper Build Kit
The Falas Upper Build Kit is built around a 16.5-inch 5.56 NATO barrel machined from 4150 chrome moly vanadium steel in a medium profile, with a mid-length gas system and a Nitride finish. It is paired with a 7075-T6 aluminum upper receiver and a black free-float extended quad rail handguard. The medium profile balances weight and stiffness at the front of the rifle, and the 1:7 twist suits a wide range of bullet weights in 5.56 NATO. The 1/2x28 muzzle threads accept a compatible muzzle device, and this build is listed as suppressor ready. A muzzle device is not listed with this kit. BCG and charging handle are not included.
Key Features
- 16.5-inch medium profile barrel, 4150 chrome moly vanadium steel, Nitride finish, 1:7 twist, 5.56x45mm NATO
- Mid-length gas system with a micro low-profile gas block sized for a .750-inch gas journal
- 7075-T6 aluminum upper receiver, anodized finish
- Free-float extended quad rail handguard, black
- 1/2x28 muzzle threads
- Suppressor ready
- BCG and charging handle are not included.
Barrel and Gas System
The 16.5-inch barrel is machined from 4150 chrome moly vanadium steel in a medium profile and finished in Nitride, a surface treatment that adds hardness and corrosion resistance while leaving a clean, matte black look. Its 1:7 twist rate is suited to a wide range of bullet weights in 5.56 NATO. The barrel runs a mid-length gas system through a micro low-profile gas block sized for a .750-inch gas journal, and the low-profile block helps it sit cleanly beneath the handguard. The muzzle is threaded 1/2x28 for a compatible muzzle device or suppressor mount.
Upper Receiver and Handguard
The upper receiver is machined from 7075-T6 aluminum and finished in anodizing, giving it a hard, wear-resistant surface that holds up to regular handling. It is paired with a black free-float extended quad rail handguard. As a free-float design, it leaves the barrel free of handguard contact, while the extended quad rail layout gives the builder Picatinny mounting surfaces on multiple sides for optics, lights, grips, and other accessories.
Compatibility
This kit is built for AR-15 lower receivers chambered in 5.56 NATO. Handguard length and material, gas tube details, feed ramp style, ejection port door and forward assist configuration, and muzzle device inclusion were not supplied with this listing and should be confirmed before purchase. Because the BCG and charging handle are not included, they must be sourced separately to complete the upper.
Follow all manufacturer instructions and safe handling practices.
Ensure compliance with all applicable federal, state, and local laws.
