AT3™ Mil Spec End Plate for AR-15 – 10 Colors Available

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AT3 Tactical Castle Nut for AR15

AT3™ Castle Nut for AR-15 Buffer Tubes – Black


AT3™ Mil Spec Buffer Tube – AR-15


Mil-Spec Steel Endplate for AR15 Lower Receivers

This standard endplate is compatible with any mil-spec AR15 lower receiver.  Perfect for completing a build that might be missing this component, or simply having a spare part available for your favorite rifle.   This endplate is made of steel and can be properly staked into a castle nut to completely secure your buffer tube on the lower receiver.  You can also add a little more color to your black rifle with with your choice of Cerakote™ finish.  You can choose from FDE, ODG, Pink, Gray, Blue, Red, Burnt Bronze, Tungsten, and Titanium.

Note: Staking an endplate with Cerakote™ finish will cause the finish to chip in that position.  This is unavoidable, and we cannot warranty the finish for this application.


  • Mil-Spec dimensions
  • Finish
    • Black: Phosphate
    • Flat Dark Earth: H-267 Magpul® Flat Dark Earth
    • OD Green: H-232 Magpul® OD Green
    • Gray: H-188 Magpul® Stealth Grey
    • Pink: H-224 SIG™ Pink
    • Red: H-167 USMC Red
    • Blue: H-171 NRA Blue
    • Burnt Bronze: H-148 Burnt Bronze
    • Tungsten: H-237 Tungsten
    • Titanium: H-170 Titanium
  • Fits: AR-15
  • Made in the USA

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Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

AT3 Lifetime Warranty Logo

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot SightsHandguardsIron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Our contact info is available here. To expedite processing, please provide your order information and description of the defect.

Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.

Customer Reviews

Based on 24 reviews
Eliseo Melendez
End Plate

Looks great, it was exactly what I was looking for.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Fit great

Delivered on time and fit great. Color was exactly what I was looking for

Remy Kim

AT3™ Mil Spec End Plate for AR-15 - 10 Colors Available

Thanks for the review! We're glad to hear that you're pleased with the product.

Guy Letourneau


Thanks for the review. We appreciate it!

It’s an end plate.

Got the FDE. Matches well with mag pull stock.

Thanks for the review! We're glad you're happy with the end plate.