Details
Warden 14.5-Inch 5.56 NATO AR-15 Pistol Upper Build Kit
This upper build kit combines a 14.5-inch 4150 CrMoV barrel with a freefloat Keymod handguard, chambered in 5.56 NATO. The kit includes an anodized 7075-T6 aluminum upper receiver with M4 feed ramps, micro low-profile gas block, carbine-length gas tube, GI birdcage flash hider, and forward assist assembly. BCG and charging handle are not included.
Key Features
- 14.5-inch M4 profile barrel, 4150 CrMoV steel with phosphate finish, 1:7 twist rate
- Freefloat Keymod handguard, 6061-T6 aluminum, black
- Anodized AR-15 upper receiver with M4 feed ramps, 7075-T6 aluminum
- Carbine-length gas system with stainless gas tube and .750 micro low-profile gas block
- 1/2x28 threaded barrel with GI birdcage flash hider
- Forward assist assembly included
Perfect For
- 5.56 NATO builds requiring 14.5-inch upper assemblies
- Shooters prioritizing M4 profile barrels
- Builders seeking freefloat Keymod handguards
- Configurations demanding carbine-length gas systems
5.56 NATO Chambering
5.56 NATO chambering provides compatibility with both 5.56 NATO and .223 Remington ammunition. The 1:7 twist rate stabilizes a wide range of bullet weights including heavier projectiles up to 77 grains.
Freefloat Keymod Handguard
The freefloat Keymod handguard provides 6061-T6 aluminum construction with modular Keymod slots for direct accessory mounting. The freefloat design isolates the barrel from external pressure, supporting accuracy.
Carbine-Length Gas System
This kit uses a carbine-length gas system with a stainless gas tube and .750 micro low-profile gas block positioned beneath the handguard. The carbine-length configuration is optimized for the 14.5-inch barrel length.
M4 Profile Barrel
The 14.5-inch M4 profile barrel features 4150 CrMoV steel construction with phosphate finish. The M4 profile provides a balance of weight reduction and barrel rigidity.
Compatibility and Assembly
This upper build kit is compatible with standard AR-15 lower receivers. All components use mil-spec dimensions and threading, including the 1/2x28 TPI muzzle threads matching the included GI birdcage flash hider.
BCG and charging handle are not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.
