Uppers

Uppers, also known as upper receivers, are a significant component of AR-15 rifles. They attach to the lower receiver and house the bolt carrier group, barrel, and other crucial parts of the firearm. As a crucial part of the AR-15 platform, uppers play a vital role in determining the rifle's performance and capabilities. AR15-Overstock.com offers a wide selection of AR-15 upper receivers, including complete uppers, stripped uppers, and individual upper parts. From different calibers and barrel lengths to various handguard options, finding the right upper for your AR-15 build is crucial for achieving your desired shooting experience.

AR15-Upper Receivers - AR15-Overstock.com

  • AR15 Pistol Upper Assembly / 7" 7.62x39 / 1:10 / 160-030

    AR15 Pistol Upper Assembly / 7" 7.62x39 / 1:10 / 160-030

    This AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is built around a 7 inch, 4150 chrome moly barrel and has a black nitride finish. The upper receiver is a forged M4 flat top upper, allowing you to easily attach...

    Was: $319.00
    On Sale $219.00
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  • AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-817

    AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-817

    This MICRO AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. The receiver is a flat top M4 forged Mil-Spec upper receiver that is CNC Machined from 7075-T6 aluminum – the hardest and most durable material of any...

    Was: $319.00
    On Sale $219.00
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  • AR15 Pistol Upper Assembly / 7" 9mm / 1:10 / 160-031

    AR15 Pistol Upper Assembly / 7" 9mm / 1:10 / 160-031

    This AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is built around a 7.5 inch, 4150 chrome moly barrel and has a black nitride finish. The upper receiver is a forged M4 flat top upper, allowing you to easily attach...

    Was: $329.00
    On Sale $219.00
    Add to Cart
  • CPF AR15 Pistol Upper Assembly / 5" 300AAC / 1:7 / 160-821

    CPF AR15 Pistol Upper Assembly / 5" 300AAC / 1:7 / 160-821

    This MICRO AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. The receiver is a flat top M4 forged Mil-Spec upper receiver that is CNC Machined from 7075-T6 aluminum, the hardest and most durable material of any upper. The...

    Was: $319.00
    On Sale $219.00
  • CPF Pistol Upper Assembly / 7" 9mm / 1:10 / Blast Can / 160-259

    CPF Pistol Upper Assembly / 7" 9mm / 1:10 / Blast Can / 160-259

    This AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is built around a 7.5 inch, 4150 chrome moly barrel and has a black nitride finish. The upper receiver is a forged M4 flat top upper, allowing you to easily attach...

    Was: $329.00
    On Sale $219.00
    Add to Cart
  • CPF Pistol Upper Assembly / 7.5" 7.62x39 / 1:10 / 160-654

    CPF Pistol Upper Assembly / 7.5" 7.62x39 / 1:10 / 160-654

    This AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is?built around a 7 inch, 4150 chrome moly barrel and has a black nitride finish. The upper receiver is a forged M4 flat top upper, allowing you to easily attach...

    Was: $319.00
    On Sale $219.00
    Add to Cart
  • AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-819 Blue

    AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-819 Blue

    Enhance your AR15 pistol with the AR15 Pistol Upper Assembly / 5 5.56 Nato / 1:5 / 160-819 Blue. This premium upper assembly is designed for optimal performance and durability. The 5 barrel is chambered in 5.56 Nato with a 1:5 twist rate, ensuring...

    Was: $339.00
    On Sale $239.00
  • AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-819 FDE

    AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-819 FDE

    Our AR15 Pistol Upper Assembly in FDE features a compact 5 barrel chambered in 5.56 Nato, with a 1:5 twist rate for optimal accuracy. This high-quality upper assembly comes ready to be attached to your AR15 pistol lower receiver, offering a sleek and...

    Was: $339.00
    On Sale $239.00
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  • Upper Assembly /16" 7.62x39 /1:10/M-Lock/160-052

    Upper Assembly /16" 7.62x39 /1:10/M-Lock/160-052

    This AR-15 upper assembly is made from the highest quality parts and is assembled in Charleston, South Carolina. The 15" M-LOK design is one of our most popular handguard/rail designs. Features: 7075-T6 Aluminum Mil-Spec Anodized Receiver Carbine Length...

    Was: $419.00
    On Sale $269.00
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  • AR15 Upper Assembly /16" 5.56 Nato /1:8/M-Lock/160-734

    AR15 Upper Assembly /16" 5.56 Nato /1:8/M-Lock/160-734

    Barrel:16″ 5.56 Nato Melonite Barrel Chrome Moly Twist Rate: 1/8 Feed Ramps: M4 Gas Block: Steel .750 Low Profile Gas Tube: DGI Stainless Carbine-Length Muzzle Device: A2 Rail: either 15″ CBC M-Lok free float rail system Upper Receiver:...

    Was: $419.00
    On Sale $269.00
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  • CPF Upper Assembly /18" 6.5 Grendel /1:8/M-Lock/160-081

    CPF Upper Assembly /18" 6.5 Grendel /1:8/M-Lock/160-081

    The Grendel 6.5 is a capable mid-size hunting caliber with ample power to take down almost anything you will venture across. This upper assembly has the perfect balance of weight, size, and power. Whether you’re tracking wild game through thick...

    Was: $419.00
    On Sale $269.00
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