The Yankee Hill 110 Flat Top Upper Receiver (brand part number YHM-110) is a forged 7075-T6 aluminum upper built for 5.56x45mm NATO and .223 Remington AR-15 builds. Yankee Hill finishes it in a hardcoat anodized matte black and machines in M4-style feed ramps along with clear T markings, then coats the interior with dry film lube for smoother cycling from the start. It accepts standard upper receiver parts like dust covers and forward assists, fits and functions with any Mil-Spec lower receiver, and completes a build alongside a dust cover, forward assist, charging handle, barrel, handguard, gas block, muzzle device, gas tube, and bolt carrier group, all sold separately.

Key Specifications

• Chambered for 5.56x45mm NATO and .223 Remington.
• Forged from 7075-T6 aluminum for strength.
• Finished in hardcoat anodized matte black.
• Machined with M4-style feed ramps for reliable feeding.
• Marked with clear T markings.
• Interior coated with dry film lube for smoother cycling.
• Accepts standard upper receiver parts, including dust covers and forward assists.
• Fits and functions with any Mil-Spec lower receiver.
• Sold as a bare upper; barrel, BCG, charging handle, and handguard are not included.

Frequently Asked Questions

Does this come as a complete upper? No, it’s a bare flat top receiver; you’ll need a barrel, BCG, charging handle, handguard, gas block, gas tube, and muzzle device to complete it.

What lower receivers does it fit? Any Mil-Spec AR-15 lower receiver.

What is it made from? Forged 7075-T6 aluminum with a hardcoat anodized matte black finish.

Buy the Yankee Hill 110 Flat Top Upper Receiver, 5.56x45mm NATO, Black Anodized

Start your build on a forged, Mil-Spec-compatible receiver. Order it from our Yankee Hill Machine lineup, part of our AR15 uppers selection, at our Lubbock, Texas gun shop for fast, direct shipping.