Aero Ar10 Upper Parts Kit

Building or upgrading your AR-10 platform rifle? The Aero Precision AR10 upper parts kit supplies the essential components you need to complete your M5 (.308) upper receiver assembly. Whether you're doing a full custom build or refreshing worn parts on an existing rifle, this kit gives you quality OEM-spec parts from a manufacturer known for tight tolerances and reliability in precision rifle applications.

Aero Precision engineered these components to work seamlessly with their M5 upper receiver platform. Rather than source parts piecemeal from different suppliers, this kit bundles the small but critical assemblies that make an upper function reliably—the forward assist mechanism, ejection port cover, and all associated springs and pins. That means one order, one quality standard, and no guessing whether random parts will play nice together.

If you're a serious AR-10 builder, repairer, or armorer stocking spares, having these components on hand beats hunting through catalogs when you need a replacement forward assist spring or ejection port door. Aero's reputation for precision machining carries through to these smaller parts, so you're getting the same attention to detail you'd expect from their receivers and barrels.

What's Included

• Forward Assist Assembly
• Forward Assist Spring
• Forward Assist Roll Pin
• Ejection Port Cover Door
• Ejection Port Cover Rod
• Ejection Port Cover Spring

Specifications

Frequently Asked Questions

Will this kit work with my AR-10 upper receiver?

This kit is designed for the Aero Precision M5 upper receiver platform in .308 Winchester. Verify your upper receiver is compatible with the M5 specification before ordering.

Do I need any other parts to complete my upper assembly?

This kit includes the forward assist and ejection port cover assemblies. You'll still need to source your bolt carrier group, charging handle, barrel, and gas system separately depending on your build requirements.

Is this a complete upper or just the small parts?

This is a parts kit containing the smaller components—springs, pins, and covers. It is not a complete upper receiver assembly. You'll need an upper receiver, barrel, bolt carrier group, and other major components to build a functional upper.

Can I use these parts as replacements for worn components?

Yes, this kit is useful for replacing individual parts that wear out or break on an existing M5 upper receiver build, or for having spares on hand for repairs and maintenance.