Bushmaster AR-15 A3 Upper Receiver Assembly 450 Bushmaster 20" Barrel
- Upper Receiver Type: A3 Flat-Top
- Barrel Length: 20"
- Barrel Contour: Not listed by manufacturer
- Barrel Material: Chrome Moly Steel
- Muzzle Thread Pattern: Not listed by manufacturer
- Chrome Lined: Yes
- Barrel Finish: Black Matte
- Twist Rate: 1 in 24"
- Chamber: 450 Bushmaster
- M4 Feed Ramps: Not listed by manufacturer
- Muzzle Device: Izzy Muzzle Brake
- Gas System Length: Carbine
- Gas Block Diameter: Not listed by manufacturer
- Handguard: Free Float
- Sights: None
- Bolt Carrier Assembly Included: Yes
- Bolt Carrier Type: N/A
Please Note: Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.
Shipping Weight: 6.250 PoundsXThe total weight of the product, including the product’s packaging as it sits on our shelf. Since some products ship directly from the Manufacturer, their weight may be unavailable. Because of variations in the manufacturing process, similar products may have differing weights. Unless the product is designated as “Ships Alone”, Shipping Weight does not include the shipping box or packing materials associated with your order.
XProduct ships from MidwayUSA, separate from any other products on your order due to its size. Products that are Shipped Alone incur separate "Per Order" and "Per Pound" shipping charges.
XProduct is regulated by the US Department of Transportation (DOT) and cannot be shipped via USPS or air shipping methods. DOT-Regulated products must ship UPS Ground.
XProduct is restricted by shipping carriers and cannot be shipped to certain locations or via certain shipping methods.
XAdditional shipping charge for HazMat products. Carriers charge extra to ship packages with products they consider hazardous, such as reloading powder and primers.
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