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 / 5" 7.62x39 / 1:5 / 160-819, black firearm upper receiver with warning label, designed for tactical use and firearm customization.

    AR15 Pistol Upper Assembly / 5" 7.62x39 / 1:5 / 160-819 Beware

    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: $359.00
    On Sale $209.00
    Add to Cart
  • AR15 Pistol Upper Assembly, 7.5 inch 5.56 Nato, Anodized Bronze finish with handguard and bolt carrier group.

    AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / ANODIZED BRONZE

    The AR15 Pistol Upper Assembly / 7.5" 5.56 NATO / Anodized Bronze delivers compact performance with standout style. Built for reliability and durability, this upper features a 7.5-inch 5.56 NATO barrel paired with a lightweight M-LOK handguard finished...

    Was: $389.00
    On Sale $255.99
    Add to Cart
  • AR15 Pistol Upper Assembly, 7.5 inch 5.56 Nato, anodized red color with black and red components, including a handguard and muzzle brake.

    AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / ANODIZED RED

    The AR15 Pistol Upper Assembly / 7.5" 5.56 NATO / Anodized Red delivers compact performance with standout style. Built for reliability and durability, this upper features a 7.5-inch 5.56 NATO barrel paired with a lightweight M-LOK handguard finished in...

    Was: $389.00
    On Sale $255.99
    Add to Cart
  • AR15 Pistol Upper Assembly, 7.5-inch 5.56 Nato, anodized purple color with black accents and aluminum construction.

    AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / ANODIZED PURPLE

    The AR15 Pistol Upper Assembly / 7.5" 5.56 NATO / Anodized Purple delivers compact performance with standout style. Built for reliability and durability, this upper features a 7.5-inch 5.56 NATO barrel paired with a lightweight M-LOK handguard finished...

    Was: $389.00
    On Sale $255.99
    Add to Cart
  • AR15 Pistol Upper Assembly, 7.5-inch 5.56 NATO, anodized blue color with black barrel and muzzle device

    AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / ANODIZED BLUE

    The AR15 Pistol Upper Assembly / 7.5" 5.56 NATO / Anodized Blue delivers compact performance with standout style. Built for reliability and durability, this upper features a 7.5-inch 5.56 NATO barrel paired with a lightweight M-LOK handguard finished in...

    Was: $389.00
    On Sale $255.99
    Add to Cart
  • AR15 Pistol Upper Assembly / 5 inch 300 AAC / 1:5 / 160-820, black metal firearm upper receiver with warning label, skull logo, and warning switch.

    AR15 Pistol Upper Assembly / 5" 300 AAC / 1:5 / 160-820 Beware

    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: $359.00
    On Sale $209.00
    Add to Cart
  • AR15 Pistol Upper Assembly, 5" 5.56 Nato, ANODIZED SILVER, firearm component with black and silver finish, long barrel with muzzle device, accessory tools for installation.

    AR15 Pistol Upper Assembly / 5" 5.56 Nato / ANODIZED SILVER

    Upgrade your build with the AR15 Pistol Upper Assembly / 5" 5.56 NATO / 1:5 / Anodized Silver. This compact upper is built for reliable performance in micro AR pistol setups. Featuring a 5" barrel chambered in 5.56 NATO with a 1:5 twist rate, it delivers...

    Was: $389.00
    On Sale $230.00
    Add to Cart
  • AR15 Pistol Upper Assembly / 5" 5.56 Nato / ANODIZED BLUE, firearm upper receiver with blue anodized finish and parts.

    AR15 Pistol Upper Assembly / 5" 5.56 Nato / ANODIZED BLUE

    Upgrade your build with the AR15 Pistol Upper Assembly / 5" 5.56 NATO / 1:5 / Iodized Blue. This compact upper is built for reliable performance in micro AR pistol setups. Featuring a 5" barrel chambered in 5.56 NATO with a 1:5 twist rate, it delivers...

    Was: $389.00
    On Sale $219.00
    Add to Cart
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