LBE Unlimited AR137RBK Ready Build Kit 13.7in CHF .223/5.56

The LBE Unlimited Ready Build Kit is a compact AR-15 upper assembly built around a premium 13.7-inch cold hammer forged (CHF) barrel with a Melonite finish. This kit ships with a complete upper receiver that includes the dust cover and forward assist installed and is intended for AR pistol or SBR configurations. Components are specified to provide a reliable, serviceable platform suitable for close-quarters and short-barrel AR applications.

Key Specifications

• Chambering is .223 REM/5.56 NATO.
• Barrel length is 13.7 inches.
• Barrel construction is cold hammer forged with a Melonite finish.
• Product type is supplied as a kit (complete upper receiver).
• Fitment is for AR-15 platforms.
• Exterior color is Black.
• Includes a NiB M16-style Bolt Carrier Group.
• Includes a free-floating handguard.
• Includes a standard charging handle.
• Includes an A2 Birdcage flash hider with crush washer.

This Ready Build Kit combines a durable CHF barrel and serviceable component set to form a compact AR upper ready for customization. Its parts selection favors longevity and field serviceability while leaving room for optics and accessory choices to suit your intended role.