Davidson Defense Flex 16.5-inch Mid-Gas 1:7 .223 Wylde AR-15 M-Lok Handguard Rifle Upper Build Kit

Flex 16.5-Inch Mid-Gas 1:7 .223 Wylde AR-15 M-LOK Handguard Rifle Upper Build Kit

The Flex Upper Build Kit is built around a 16.5-inch .223 Wylde barrel with a mid-length gas system and a 15-inch Slant-Pro Series A free-float M-LOK handguard. BCG and charging handle are not included.

Key Features

• 16.5-inch barrel, 4150 steel, Nitride finish, 1:7 twist, .223 Wylde chamber
• Mid-length gas system
• 7075-T6 aluminum upper receiver with M4 feed ramps, anodized finish
• 15-inch Slant-Pro Series A free-float M-LOK handguard with flat top, integrated quad rail section, built-in QD mounts, anti-rotation tabs, and oblong ventilation cuts
• A2 extended flash hider, Phosphate finish, pre-drilled for pinning and welding, on 1/2x28 threads with 1/2-inch black crush washer
• BCG and charging handle are not included.

Barrel and Gas System

The 16.5-inch barrel is machined from 4150 steel and finished in Nitride with a 1:7 twist rate and a .223 Wylde chamber, featuring engraved markings. It runs a mid-length gas system through a stainless steel gas tube and a micro low-profile steel gas block with a .750-inch diameter. At the muzzle, 1/2x28 threads carry the included A2 extended flash hider, finished in Phosphate and pre-drilled for pinning and welding, secured with the supplied 1/2-inch black crush washer.

Upper Receiver and Handguard

The upper receiver is machined from 7075-T6 aluminum with M4 feed ramps and an anodized finish, and it includes the forward assist assembly along with the ejection port door, rod, and spring. It's paired with a 15-inch Slant-Pro Series A free-float M-LOK handguard featuring a flat top with an integrated quad rail section, built-in QD sling mounts, anti-rotation tabs, and oblong ventilation cuts.

Follow all manufacturer instructions and safe handling practices.

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