
AT3™ FU-BAG™ AR-15 Lost Parts Kit – Springs, Detents, Replacement Components
Mil-Spec AR-15 Magazine Catch Button
All AT3 Tactical lower receiver parts meet or exceed Mil Spec. The magazine catch button is no exception. Steel construction with proper threading and dimensions, plus a durable Melonite finish to lasting wear protection. If you ended up with a damaged or missing piece, this is a perfect replacement. It’s also available in 6 other colors as durable Cerakote™ finishes – FDE, ODG, Pink, Gray, Blue, Red, Burnt Bronze, Tungsten, and Titanium.
Consider pairing this with AT3’s Mil-Spec Magazine Catch, or going for a whole matching Magazine Catch Assembly with Spring.
Features:
- Mil-Spec dimensions and function
- 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
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.
All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.
This includes AT3 Red Dot Sights, Handguards, Iron 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.