Premium AR-15 A3 Upper Receiver Assembly - Precision-Machined & Ready for Customization

An Anderson Manufacturing AR-15 A3 upper receiver assembly gives you a solid foundation for building or upgrading your rifle. This assembled upper comes ready to mount on a compatible lower receiver, with the dust cover and forward assist already installed—no need to source those parts separately. It's machined from 7075 T6 aluminum forgings and finished in Type III hard coat black anodize, which means it'll hold up to serious use and won't wear through easily.

The upper is built to military specifications and features M4 feed ramps, making it compatible with multiple calibers on the AR-15 platform. That versatility matters whether you're running 5.56, .223, or planning a caliber conversion down the road. The precision machining ensures tight tolerances and reliable function, while the hard anodize finish resists corrosion and stays looking good in the field or at the range.

If you're assembling an AR from the ground up, swapping uppers between builds, or just want a quality receiver to start a custom rifle project, this Anderson upper gives you a no-nonsense platform without paying for unnecessary frills. It's the kind of straightforward, well-made component that works as hard as you do.

Key Features

• Assembled with dust cover and forward assist already installed
• 7075 T6 aluminum forging for strength and durability
• M4 feed ramps machined to military specifications
• Type III hard coat black anodize finish resists wear and corrosion
• Compatible with multiple AR-15 platform calibers
• Ready to pair with a compatible lower receiver

Specifications

Frequently Asked Questions

What calibers will this upper receiver work with?

This Anderson upper is compatible with multiple calibers on the AR-15 platform. It features M4 feed ramps and is machined to military specifications, allowing you to run calibers like 5.56 NATO, .223 Remington, and other standard AR-15 cartridges. Always verify your specific barrel and ammunition combination for reliable feeding.

Does it come assembled with all the parts I need?

This is an assembled upper receiver, meaning it comes with the dust cover and forward assist already installed. You'll need to pair it with a compatible AR-15 lower receiver and select a barrel, bolt carrier group, and charging handle separately to complete a functional rifle.

What makes the anodize finish durable?

The Type III hard coat black anodize is a thicker, harder finish than standard anodizing. It provides excellent resistance to corrosion and resists scratching and wear from handling, cleaning, and use in the field.

Is this upper receiver built to military standards?

Yes, this Anderson upper is machined to military specifications and standards, ensuring it meets the dimensional and functional requirements for AR-15 platform rifles.