AT3™ Mil-Spec AR-15 Selector Detent

SKU: AT3-SD-01

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Mil-Spec AR-15 Selector Detent

All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR safety assembly and are perfect for replacing lost or damaged parts.

Whether you’re replacing a lost or damaged buffer retainer or just looking for a high-quality upgrade, the Mil-Spec AR-15 Selector Detent from AT3 Tactical is an excellent choice. So why wait? Order yours today and experience the quality and reliability that only AT3 Tactical can offer.



  • Brand: AT3 Tactical
  • Model: Mil-Spec AR-15 Selector Detent
  • MPN: AT3-SD-01
  • Material: Steel
  • Fit: AR-15

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 4 reviews
Terry Soles
Arrived fast and was packaged really well

Easy to order and check out it was shipped fast and packed very well it was a perfect fit thank you at3

Mike Underwood
AR15 Spare Parts

Quality seems very good and shipping parts to me was great. Very fast service.

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

Nolan Sanders
Replacement parts

Ordered to have spares. Quality looks good and fast service on order

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

John Pouncy
needed parts

detents and detent springs are needed for ar15 builds and for replacing worn parts. the time to get them is before you need them. AT3 Tactical is the place to shop, with quality mil-spec parts and quick shipping!