The Faxon AR-15 End Plate is a Mil-Spec component designed to properly secure and align the receiver extension on AR-15 lower receivers. Built for dependable fitment and function, it serves as the critical interface between the lower receiver and the castle nut assembly.
This end plate is a foundational part of any AR-15 stock assembly. It keeps the buffer tube aligned and gives the castle nut a stable surface to lock against.
What the Faxon AR-15 End Plate Is and Who It Is For
This is a Mil-Spec end plate from Faxon Firearms, made for builders assembling or repairing an AR-15 lower. It sits between the receiver extension and the castle nut to hold everything in alignment.
It fits new builds and replacement work alike, integrating cleanly into both factory configurations and custom rifles. Anyone finishing a lower or refreshing a worn buffer system needs this component.
Its straightforward design makes it a dependable choice for a wide range of projects.
Key Features
The end plate is built for correct fitment and reliable function.
- Machined to Mil-Spec dimensions for broad compatibility
- Secures and aligns the receiver extension on the lower
- Stable surface for proper castle nut retention and staking
- Integrates into factory and custom AR-15 builds
- Simple, functional design with no unnecessary complexity
- Supports consistent installation under hard use
Specifications and Build
The Faxon AR-15 End Plate is manufactured to Mil-Spec dimensions, ensuring compatibility with standard AR-15 lower receivers and receiver extensions. That dimensional accuracy is what lets it drop into both factory and custom builds without fuss.
It provides a stable surface for proper castle nut retention and staking, which keeps the buffer system aligned under normal and hard-use conditions. The simple, functional design supports consistent installation every time.
This is exactly the kind of no-nonsense component a reliable build depends on.
Practical Use, Care, and Compatibility
Installation places the end plate over the receiver extension before the castle nut is threaded on and torqued. Correct orientation keeps the assembly aligned and gives the castle nut a solid base.
Once installed, the end plate is maintenance-free, though a quick check during detailed cleaning never hurts. Its simple construction needs no special care.
Complete your lower with matching parts from our AR parts and upgrades category. The Faxon AR-15 End Plate works directly with a Mil-Spec castle nut and receiver extension to finish the stock assembly.
The Foundation of a Solid Stock Assembly
The end plate does quiet but important work, aligning the receiver extension and giving the castle nut a stable surface to lock against. Get it wrong and the whole assembly suffers.
Built to Mil-Spec dimensions, this plate drops into standard lowers without fitting or filing. That precision is what keeps the buffer system aligned under hard use.
It is also the kind of part worth keeping in your spares box. A cracked or missing end plate can sideline a rifle, and a correct replacement gets it running again fast.
Paired with a quality castle nut, it completes the rear of the lower reliably and repeatably.
Getting the Most From It
Slide the end plate over the receiver extension before threading and torquing the castle nut. Correct orientation keeps the assembly aligned and the sling point where you want it.
After installation, the end plate is maintenance-free, though a quick check during a detailed cleaning is always good practice. Its simple design needs no special care.
This end plate ships direct where state and local law allows, arriving ready to complete your build.
It works directly with a Mil-Spec castle nut and receiver extension to finish the stock assembly cleanly.
Keeping a spare on hand means a damaged plate never has to sideline a rifle for long.
For proper buffer tube alignment on any build, the Faxon AR-15 End Plate is a must-have. Ships direct to your door, no FFL required.
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