AT3™ 9mm A2 Flash Hider for AR-15 with Crush Washer – 1/2×28 Threads

SKU: MD-05-9MM

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Armorer's Wrench for AR-15 & Multi-Function Tool by AT3™

Armorer’s Wrench for AR-15 & Multi-Fuction Tool by AT3™


Birchwood Casey Shoot-N-C Target - Round Bullseye - 12" - 5 Targets

Birchwood Casey Shoot-N-C Target - Round Bullseye - 12" - 5 Targets


AT3 9mm Flash Hider with 1/2×28 Threads

This 9mm version of the A2 birdcage makes a perfect fit for your next AR-9 build, or for a .350 Legend AR-15. This flash hider features five ports for directing concussion and gasses to keep the muzzle steady, and an open cone to disperse flash. This flash hider uses 1/2×28 threads, which is most common for 9mm AR-15s today; but make sure the barrel you’re installing it on also uses the same thread pitch.

Be sure to pick up an Armorer’s Wrench for a simple installation!


  • Bored for 9mm – includes .350 Legend!
  • 1/2×28 Threads
  • Machined steel with phosphate finish for excellent corrosion resistance
  • Backed by the Lifetime AT3 Warranty


  • Caliber: 9mm or .350 Legend
  • Threads: 1/2×28
  • Material: Steel
  • Finish: Phosphate
  • Weight: 2.2 oz (including crush washer)

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.