Davidson Defense Davidson Defense 'Slade 5.56' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit

Davidson Defense Slade 5.56 Upper Build Kit

The Davidson Defense Slade 5.56 is a 16.5-inch upper assembly built around a nitride-treated 4150 CrMoV barrel with a 1:7 twist rate. This configuration delivers reliable 5.56 NATO performance in a mid-length gas system setup. The upper receiver is 7075-T6 aluminum with M4 feed ramps, paired with a 12-inch M-Lok handguard for mounting flexibility. A micro low-profile gas block and mid-length stainless steel gas tube manage cycling, while the included A2 flash hider and forward assist round out the package.

Key Features

• 16.5-inch nitride barrel, 4150 CrMoV steel, 1:7 twist for 5.56 NATO
• 7075-T6 aluminum upper receiver with M4 feed ramps
• 12-inch M-Lok handguard, 6061-T6 aluminum construction
• Micro low-profile gas block with mid-length gas tube
• A2 flash hider, 1/2x28 thread pitch, crush washer included
• Forward assist assembly and ejection port door included

Perfect For

• Builders looking for a complete upper assembly solution
• Mid-length gas system shooters who prefer a balanced profile
• 5.56 NATO platform builders needing quality components
• Shooters who want M-Lok modularity without premium pricing

Nitride Barrel Durability

The nitride finish on this 4150 CrMoV barrel provides corrosion resistance and extended barrel life compared to standard phosphate finishes. Nitride treatment hardens the steel surface while maintaining the barrel's internal dimensions for precision. The 1:7 twist rate stabilizes a wide range of 5.56 ammunition, from lighter 55-grain rounds to heavier 77-grain loads, making this upper versatile for different shooting applications.

Mid-Length Gas System Balance

This upper uses a mid-length gas tube paired with a micro low-profile gas block. Mid-length systems sit between carbine and rifle-length configurations, offering reduced felt recoil and faster bolt cycling compared to carbine systems. The micro low-profile design keeps sight lines lower and reduces overall profile without sacrificing gas system reliability.

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