Warden Duty 16" AR-15 .223 Wylde Rifle Build Kit, Carbine-Gas, Free-Float KeyMod

Warden Duty 16-Inch .223 Wylde AR-15 Full Build Kit

This is a complete AR-15 rifle kit built around a 16-inch .223 Wylde barrel with a 1:8 twist rate, designed for reliable performance across a wide range of ammunition weights. The kit includes a USA-made bolt carrier group, mil-spec lower parts kit, buffer system, and a freefloat KeyMod handguard that separates the barrel from the rail system for improved accuracy potential. Everything needed to complete a functional rifle is included except the serialized lower receiver.

Key Features

• 16-inch 4150 CrMoV barrel, phosphate finish, government profile with 1:8 twist rate
• .223 Wylde chamber accepts both 5.56 NATO and .223 Remington ammunition
• Freefloat 15-inch KeyMod handguard eliminates barrel contact for consistent shooting
• Carbine-length gas tube with micro low-profile gas block for compact cycling
• USA-made 9310 alloy steel bolt carrier group with nitride finish
• Mil-spec lower parts kit, buffer tube, buffer, and recoil spring included
• M4 feed ramps and forward assist on upper receiver
• 1/2x28 threaded muzzle with A2 birdcage flash hider

Perfect For

• Builders seeking a complete kit requiring only a lower receiver
• Shooters wanting a reliable 16-inch carbine platform
• Those prioritizing freefloat accuracy without full-length uppers
• Budget-conscious builders with USA-made component quality

Freefloat Handguard Design

The 15-inch KeyMod handguard floats freely around the barrel, meaning the barrel does not contact the rail system. This design reduces harmonics and improves shot-to-shot consistency compared to handguards that touch the barrel. The freefloat configuration also provides mounting flexibility for accessories without affecting barrel vibration patterns.

.223 Wylde Chamber Advantage

The .223 Wylde chamber is a hybrid design that safely fires both 5.56 NATO and .223 Remington ammunition. The chamber throat is tighter than standard 5.56 NATO specs, which can improve accuracy with .223 Remington loads while maintaining full compatibility with military-spec 5.56 NATO rounds. This versatility lets you shoot whatever ammunition is available or cost-effective.

Carbine-Length Gas System

This kit uses a carbine-length gas tube paired with a micro low-profile gas block. The carbine system cycles faster than rifle-length setups and produces a more compact profile. The low-profile gas block sits lower on the barrel, improving sight line access and reducing overall height.

1:8 Twist Rate Performance

The 1:8 twist rate stabilizes a wide range of bullet weights, from 55-grain varmint rounds through heavier 77-grain match ammunition. This versatility makes the kit suitable for both target shooting and hunting applications without needing different barrels for different loads.

Lower receiver not included. BCG and charging handle are not included in the upper assembly alone, but are included in this full build kit. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.