ATI MilSport Upper Features
Purpose-built for performance, the MilSport Upper is equipped with a 1:24” twist rate to stabilize the heavy .450 Bushmaster projectiles, making it ideal for hunting large game or enhancing terminal ballistics. The A2 compensator helps mitigate muzzle rise and recoil, offering faster follow-up shots and greater control. A full-length 15-inch M-LOK handguard provides ample space for optics, lights, and foregrips, while maintaining a streamlined profile.
Constructed from durable aluminum and finished in black anodizing, the receiver is built for long-term reliability in the field or on the range. With no sights included, this upper allows you to customize your optics and iron sight setup. Whether upgrading your rifle for hunting season or creating a dedicated .450 Bushmaster build, this complete upper delivers premium features at an affordable price.
ATI MilSport Upper Specifications
- Brand: ATI
- Series: Upper Complete
- Model: MilSport
- Caliber: .450 Bushmaster
- Firearm Fit: AR-15
- Capacity: 5rd
- Type: Complete
- Barrel Finish: Black Nitride
- Twist Rate: 1:24″
- Muzzle: A2 Compensator
- Sights: None
- Handguards: 15″ M-LOK
- Receiver Material: Aluminum
- Receiver Finish: Black Anodized
Frequently Asked Questions About This Product
Why buy American Tactical Mil-Sport Complete Upper Black .450 BM 16" Barrel from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy American Tactical Mil-Sport Complete Upper Black .450 BM 16" Barrel?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is American Tactical Mil-Sport Complete Upper Black .450 BM 16" Barrel available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: RIFLES, Uppers.
What tags or features does this product have?
Key features and tags for this product include: RIFLES, Uppers.
Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
FFL Transfer & Firearms Laws for American Tactical Mil-Sport Complete Upper Black .450 BM 16" Barrel
All firearms, including the American Tactical Mil-Sport Complete Upper Black .450 BM 16" Barrel, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the American Tactical Mil-Sport Complete Upper Black .450 BM 16" Barrel is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
