AT3 Tactical™ Complete AR-15 Upper Parts Kit – Forward Assist & Dust Cover

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AT3™ MOTHERFU-BAG™ AR-15 Lost and Extra Parts Kit - Springs, Detents, Replacement Components


AT3™ MOTHERFU-BAG™ – The BIG AR-15 Lost Parts Kit – Springs, Detents, Wear Parts, and More

Complete Upper Parts Kit For Your Stripped Upper Receiver

The AT3 Tactical™ AR-15 Upper Parts Kit is an ideal replacement for your standard forward assist and ejection port cover. It is compatible with all standard AR15/M16 style ejection uppers and includes all the parts you need to assemble a stripped AR15 Upper Receiver.

The kit includes AR-15 ejection port cover, rod, spring, and forward assist kit.  If you’re looking to replace an existing dust cover, check out this guide first!


  • Includes complete forward assist kit and ejection port kit
  • Fits all standard AR15 / M16 style ejection uppers
  • Phosphate coated
  • Weight 1.6 ounces
  • 100% USA Made

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 2 reviews
Upper parts kit

Everything seems fine. Not installed yet.

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


Very good pack

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