15" rail with 18" 450 bushmaster barrel pointed to the right 15" rail with 18" 450 bushmaster barrel pointed to the right
SKU: UA45B18SS24BU32M_15ML00_CB
AR15parts.com

18" 450 BUSHMASTER Stainless Barrel - 15" Rail - Multi Port Compensator - AR15 Rifle Upper Assembly

$560.00
$400.00
(You save $160.00)

18" 450 Bushmaster Stainless AR15 Rifle Upper Assembly with 15" Rail and Steel Multi Port Compensator

The .450 Bushmaster is a rifle cartridge developed by Tim LeGendre of LeMag Firearms, and licensed to Bushmaster Firearms International. The .450 Bushmaster is designed to be used in standard M16s and AR-15s, using modified magazines and upper receiver assemblies. The .450 Bushmaster makes use of .452 in. bullets because of the lower impact velocities and energies would not adequately expand the heavier jacketed .458 in. bullets. Ballistically, the .450 Bushmaster has a rather flat trajectory out to 200 yards; if the firearm is zeroed at 150 yards, the user can expect to see a rise of 1.8 inches at 100 yards, zero at 150 yards, and a drop of 4.9 inches at 200 yards.

Specifications:

  • 18" 450 Bushmaster 416R Stainless Heavy Barrel with 1x24 Twist and 11/16 X 24 Threads. Proper single feed ramp for 450 Bushmaster cartridge.
  • Mil-Spec forged aluminum upper receiver with forward assist and dust cover assembly installed. Matte black hard coat anodized Mil 8625 Type 3 Class 2. One large single Feed Ramp for big bore cartridges. Forged from 7075 T6 aluminum. This receiver has been correctly modified around the ejection port to allow for clearance and proper ejection of the 450 Bushmaster cartridge.
  • 15" Narrow Profile Free Float Rail. Very comfortable and very light weight. Your choice of MLOK or KEYMOD attachment points along the entire length at 3, 6, and 9 positions.
  • 0.750 low profile gas block.
  • Mid-length Gas Tube.
  • Steel Multi Port Compensator with crush washer.

Options:

  • AR15parts will customize (to your specificaions in the drop down menu) your AR15 upper with the Rail Type (M-LOK or KEYMOD), a Magazine or two, one of our High Quality Bolt Carrier Groups, and your choice of 5 different Charging Handles.

This upper assembly will fit all standard AR15 lower receivers.

This item is considered "Firearm Parts", not a complete firearm (it has no serialized components). Therefore, it can be shipped directly to you with no FFL transfer required.

You are responsible for knowing federal, state and local laws that may be applicable to this item. AR15Part.com reserves the right to not ship to addresses where it may not be legal to own this item.

Full Description
Current Stock: 97
Rail Type *
Muzzle Device
Magazine
Bolt Carrier Group
Charging Handle
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  • Description

    18" 450 Bushmaster Stainless AR15 Rifle Upper Assembly with 15" Rail and Steel Multi Port Compensator

    The .450 Bushmaster is a rifle cartridge developed by Tim LeGendre of LeMag Firearms, and licensed to Bushmaster Firearms International. The .450 Bushmaster is designed to be used in standard M16s and AR-15s, using modified magazines and upper receiver assemblies. The .450 Bushmaster makes use of .452 in. bullets because of the lower impact velocities and energies would not adequately expand the heavier jacketed .458 in. bullets. Ballistically, the .450 Bushmaster has a rather flat trajectory out to 200 yards; if the firearm is zeroed at 150 yards, the user can expect to see a rise of 1.8 inches at 100 yards, zero at 150 yards, and a drop of 4.9 inches at 200 yards.

    Specifications:

    • 18" 450 Bushmaster 416R Stainless Heavy Barrel with 1x24 Twist and 11/16 X 24 Threads. Proper single feed ramp for 450 Bushmaster cartridge.
    • Mil-Spec forged aluminum upper receiver with forward assist and dust cover assembly installed. Matte black hard coat anodized Mil 8625 Type 3 Class 2. One large single Feed Ramp for big bore cartridges. Forged from 7075 T6 aluminum. This receiver has been correctly modified around the ejection port to allow for clearance and proper ejection of the 450 Bushmaster cartridge.
    • 15" Narrow Profile Free Float Rail. Very comfortable and very light weight. Your choice of MLOK or KEYMOD attachment points along the entire length at 3, 6, and 9 positions.
    • 0.750 low profile gas block.
    • Mid-length Gas Tube.
    • Steel Multi Port Compensator with crush washer.

    Options:

    • AR15parts will customize (to your specificaions in the drop down menu) your AR15 upper with the Rail Type (M-LOK or KEYMOD), a Magazine or two, one of our High Quality Bolt Carrier Groups, and your choice of 5 different Charging Handles.

    This upper assembly will fit all standard AR15 lower receivers.

    This item is considered "Firearm Parts", not a complete firearm (it has no serialized components). Therefore, it can be shipped directly to you with no FFL transfer required.

    You are responsible for knowing federal, state and local laws that may be applicable to this item. AR15Part.com reserves the right to not ship to addresses where it may not be legal to own this item.

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  • Details

    Details

    Current Stock: 97
    SKU: UA45B18SS24BU32M_15ML00_CB
    Availability: Usually Ships in 24 Hours
    Old SKU: UA45B16SS24HC_12ML00_CB