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 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
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  • 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
  • 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 $230.00
    Add to Cart
  • AR15 Pistol Upper Assembly, 5-inch 5.56 Nato, Anodized Bronze, with barrel, handguard, and muzzle device.

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

    Upgrade your build with the AR15 Pistol Upper Assembly / 5" 5.56 NATO / 1:5 / Iodized Bronze. 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-inch 5.56 NATO, anodized purple finish with included purple handguard and muzzle device.

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

    Upgrade your build with the AR15 Pistol Upper Assembly / 5" 5.56 NATO / 1:5 / Purple. This compact upper features a 5" barrel with a 1:5 twist rate for reliable performance in micro setups. Finished in a bold purple color, it adds standout style to your...

    Was: $389.00
    On Sale $230.00
  • AR15 Pistol Upper Assembly, 5-inch 5.56 Nato, anodized red finish, with charging handle and muzzle brake

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

    Enhance your AR-15 pistol with the AR15 Pistol Upper Assembly / 5" 5.56 NATO / 1:5 / Red. Built for performance and durability, this compact upper is ideal for shooters looking for a powerful, space-saving setup. Featuring a 5" barrel chambered in 5.56...

    Was: $389.00
    On Sale $230.00
    Add to Cart
  • AR15 Pistol Upper Assembly, 4-inch 9mm, Black, with Blast Can America branding.

    AR15 Pistol Upper Assembly / 4" 9mm / BLAST CAN AMERICA 160-500

    Tactical Precision: 4" 9mm AR-15 Upper with Flush Blast Can Compact, patriotic, and built for performance. This 4" 9mm complete upper receiver is the ultimate solution for shooters building a high-speed PDW or a discreet backpack pistol. It features a...

    Was: $359.00
    On Sale $209.00
    Add to Cart
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