AT3 AR-9 Barrel Builder Kit – 8.3″ 9mm Straight Profile Barrel & BCG
or 4 interest-free payments of $38.83 with 
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
- Free standard shipping on orders $139+ details
- 90-day no-hassle returns policy
- Backed by the AT3 Lifetime Warranty! what it covers
Product description
AT3 AR-9 Barrel Builder Kit – 8.3 Inch 9mm Barrel and BCG
Features
- Includes the barrel and bolt carrier group for an 8.3 inch 9mm AR-9 upper build
- Built around an AT3 8.3 inch 9mm straight profile barrel with 1/2×28 muzzle threads
- Includes an AT3 nitride 9mm bolt carrier group for direct blowback AR-9 operation
- Simplifies parts selection for a compact pistol-caliber AR upper project
- No gas block or gas tube required for standard blowback 9mm AR builds
The AT3 AR-9 Barrel Builder Kit gives you the two core parts for a compact 9mm AR upper: the barrel and bolt carrier group. This kit pairs an 8.3 inch straight profile 9mm barrel with a nitride 9mm BCG, making it a cleaner starting point for builders who already have their upper, handguard, charging handle, and muzzle device picked out.
Note: This kit is not assembled. Upper receiver, handguard, charging handle, muzzle device, lower receiver, magazine system, and small installation tools are not included.
Specifications
- Brand: AT3 Tactical
- Model: AR-9 Barrel Builder Kit – 8.3 Inch 9mm Straight Profile with BCG
- MPN: AT3-AR9-BBKIT-83-9MM-SP-BCG
- Platform: AR-9 / PCC
- Caliber: 9mm
- Barrel Length: 8.3 inches
- Barrel Profile: Straight Profile
- Muzzle Thread Pitch: 1/2×28
- Operating System: Direct Blowback
- BCG Finish: Nitride
What’s Included
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Warranty & returns
Backed by the AT3 Lifetime Warranty!
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.
90-day no-hassle returns
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.
