AT3™ .300BLK 16″ Assembled Forged Upper – 2A Basics ASAL 15" Handguard – No BCG/Charging Handle
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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 2 brand warranties what it covers
Product description
AT3™ 300 BLK 16″ Assembled Forged Upper – 2A Basics ASAL 15″ Handguard – No BCG/Charging Handle
Built to Order – Ships Within 3 Business Days
This assembled upper delivers a full-length 300 BLK platform focused on versatility and value without breaking the bank. This is the foundation for shooters building a hunting rifle, suppressor host, or multi-purpose setup where you need the hard-hitting performance of 300 BLK with maximum velocity from a 16-inch barrel. The 15-inch 2A Basics ASAL handguard provides M-LOK mounting on all sides with a patent-pending Anti-Slip/Anti-Lift attachment system that ensures a rock-solid fit while keeping weight and cost down.
The AT3 16-inch medium profile barrel in 300 BLK features black nitride finish for durability and corrosion resistance, with a pistol-length gas system for reliable cycling with both supersonic and subsonic ammunition. The 1:7 twist rate stabilizes both light and heavy projectiles across the full range of 300 BLK loads. The 2A Basics ASAL handguard weighs just 10 ounces without mounting hardware and features M-LOK slots on all sides, anti-rotation tabs, and a shaved Picatinny top rail for weight savings while maintaining full functionality.
Built on AT3’s forged upper receiver with forward assist and dust cover installed, this setup pairs a low-profile .750 steel gas block and stainless gas tube for reliable function. The AT3 birdcage flash hider effectively reduces muzzle flash and gives the muzzle a clean, finished look.
Note: Does not include bolt carrier group or charging handle. The upper is shipped fully assembled.
Features
- 16-inch medium profile barrel with pistol-length gas system for reliable cycling
- 4150 Chrome Moly Vanadium steel with black nitride finish
- 1:7 twist rate stabilizes both light and heavy 300 BLK projectiles
- 15-inch 2A Basics ASAL handguard with patent-pending Anti-Slip/Anti-Lift mounting system
- M-LOK attachment slots on all sides for maximum modularity
- Lightweight design at just 10 ounces without mounting hardware
- Forged upper receiver with forward assist and dust cover installed
- Birdcage flash hider reduces muzzle flash
Specifications
- Brand: AT3 Tactical
- Model: .300BLK 16″ Assembled Forged Upper – 2A Basics ASAL 15″ Handguard – No BCG/Charging Handle
- MPN: AT3-ASAL-300-16-BLK
- Caliber: 300 BLK
- Barrel Length: 16 inches
- Barrel Profile: Medium
- Barrel Material: 4150 Chrome Moly Vanadium
- Barrel Finish: Black nitride
- Barrel Twist: 1:7
- Barrel Weight: 29 ounces
- Gas System: Pistol-length
- Handguard Length: 15 inches
- Handguard Type: M-LOK free-float
- Handguard Material: 6061-T6 Aluminum
- Handguard Weight: 10 ounces (12 ounces with mounting hardware)
- Upper Receiver: Forged with forward assist and dust cover
- Gas Block: .750 low-profile steel
- Muzzle Device: Birdcage flash hider (5/8×24 thread)
- Color: Black
What’s Included – Installed
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Warranty & returns
Limited 1 Year Warranty
- 2A Basics offers a limited 1 Year warranty against any defects from the manufacturing process. If your product is not usable, directly from the packaging, 2A Basics will replace or refund your items at no additional cost to you. 2A Basics reserves the right to withhold warranty support if product damage is deemed to be caused by the customer. Warranty expires 90 days after the verified purchase date.
- If you need to replace an item, please contact support@at3tactical.com for assistance.
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.










