ONE HORSE 5.56 NATO COMPLETE UPPER RECEIVER W/HBAR MID-LENGTH BBL FOR AR-15

Upgrade your rifle with a precision-driven 16" 5.56 NATO HBAR complete upper receiver built for durability, accuracy, and sustained performance. Engineered for shooters who demand consistency, this upper delivers enhanced stability and reliability in a ready-to-install package.

At the core is a 16" HBAR (Heavy Barrel) profile designed for increased rigidity and improved heat management. The heavier barrel profile reduces flex during firing, helping maintain tighter shot groupings and consistent performance over extended shooting sessions.

The 15" free-float M-LOK handguard improves accuracy by minimizing barrel interference while offering a lightweight, modular platform for mounting accessories. Combined with a mid-length gas system, this setup ensures smoother cycling and balanced recoil.

Equipped with a nitride bolt carrier group, this upper provides dependable operation, corrosion resistance, and long service life. A full-length Picatinny rail allows for easy installation of optics and accessories, making it adaptable for a variety of shooting applications.

Fully assembled and ready to install, this upper pins directly onto any compatible mil-spec AR-15 lower.

FEATURES

• 16" 5.56 NATO HBAR Barrel – Heavy profile for increased rigidity and consistent accuracy
• 1:8 Twist Rate – Stabilizes a wide variety of bullet weights
• Mid-Length Gas System – Smooth cycling and reduced recoil impulse
• 15" M-LOK Free-Float Handguard – Enhanced accuracy with modular accessory mounting
• Nitride Bolt Carrier Group – Durable, corrosion-resistant, and low maintenance
• Full-Length Picatinny Rail – Ready for optics and attachments
• Clamp-On System w/ Steel Barrel Nut – Secure and stable installation
• Mil-Spec Compatibility – Fits standard AR-15 lower receivers
• Made in USA – Built with quality materials and workmanship

WHAT’S INCLUDED

• Complete upper receiver assembly
• 16" 5.56 NATO HBAR barrel
• 15" M-LOK free-float handguard
• Nitride bolt carrier group (BCG)
• Charging handle
• Steel barrel nut and mounting hardware

SPECIFICATIONS

• Caliber: 5.56 NATO
• Barrel Length: 16"
• Barrel Profile: HBAR
• Barrel Material: 4150 steel
• Twist Rate: 1:8
• Gas System: Mid-Length
• Handguard Length: 15"
• Muzzle Thread: 1/2x28
• Mounting System: Clamp-on
• Country of Origin: USA