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 Upper Assembly / 18" 6.5 Grendel 160-075, black tactical upper with handguard and barrel for rifle customization.

    AR15 Upper Assembly / 18" 6.5 Grendel 160-075

    This AR-15 upper assembly is designed to deliver enhanced accuracy and ballistic performance with the powerful 6.5 Grendel platform. Featuring a 18" barrel, it provides an excellent balance of velocity, range, and handling, making it suitable for both...

    Was: $499.00
    On Sale $209.00
  • Stainless Steel Upper Assembly /16" 223 Wylde, firearm upper receiver with a black and colorful artistic finish, featuring a modern and lightweight design for AR-15 rifles.

    Stainless Steel Upper Assembly /16" 223 Wylde 160-074

    This stainless steel upper assembly is built for shooters who demand reliability, durability, and consistent performance. Featuring a 16" .223 Wylde barrel, it offers the versatility to safely fire both .223 Remington and 5.56 NATO ammunition while...

    Was: $599.00
    On Sale $309.00
  • AR15 Pistol Upper Assembly, 5-inch 5.56 NATO barrel with 1:5 twist and Fear Nothing branding, black finish, and tactical rail.

    AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-817 Fear Nothing

    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 $219.00
  • AR15 Pistol Upper Assembly, 5-inch 7.62x39 caliber, with 1:10 twist rate, model 160-819, black metallic finish, includes barrel and handguard

    AR15 Pistol Upper Assembly / 5" 7.62x39 / 1:10 / 160-819

    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 $219.00
  • AR15 Pistol Upper Assembly, 5" 5.56 Nato, 1:5, 160-819 Orange, gun upper receiver with orange handguard and compatible tools included.

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

    Enhance your AR15 pistol with the AR15 Pistol Upper Assembly / 5 5.56 Nato / 1:5 / 160-819 Orange. 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: $389.00
    On Sale $239.00
  • AR15 Pistol Upper Assembly, 5 inch 5.56 Nato, with gold and black finish, featuring a sleek design and precision construction.

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

    Enhance your AR15 pistol with the AR15 Pistol Upper Assembly / 5 5.56 Nato / 1:5 / 160-819 Red. 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: $389.00
    On Sale $239.00
  • AR-15 5.56 NATO 5'' - BILLET UPPER WITH 4'' HANDGUARD/ 160-830, black rifle upper with a custom American flag and star pattern, featuring a rail for mounting accessories.

    AR-15 5.56 NATO 5'' - BILLET UPPER WITH 4'' HANDGUARD/ 160-830

    Kit cannot be changed, no modifications will be accepted • This is NOT a FFL item. Left Side Charging Handle Includes: 5.56 NATO PISTOL 5" INCH PISTOL LENGTH BARREL 1:5 5R TWIST - BLACK NITRIDE (MADE IN USA) AR-15/47/9/300 Custom Lightweight Side...

    $330.00 - $400.00
  • AR15 Pistol Upper Assembly / 7.5 inch 5.56 Nato / 1:5 / 160-829, black, tactical firearm component with handguard and barrel

    AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:5 / 160-829

    Enhance your AR15 pistol with the AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:7 / 160-829. This premium upper assembly is designed for optimal performance and durability. The 7.5 barrel is chambered in 5.56 Nato with a 1:7 twist rate, ensuring...

    Was: $379.00
    On Sale $229.00
    Add to Cart
  • AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:5 / 160-829 Red, firearm parts with a black upper receiver and red accents, including a silencer tip and a T-handle tool.

    AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:5 / 160-829 Red

    Enhance your AR15 pistol with the AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:7 / 160-829 Red. This premium upper assembly is designed for optimal performance and durability. The 7.5 barrel is chambered in 5.56 Nato with a 1:7 twist rate, ensuring...

    Was: $399.00
    On Sale $249.00
  • AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:5 / 160-829 ODG, black and olive green rifle upper assembly with handguard, barrel, and charging handle isolated on white background.

    AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:5 / 160-829 ODG

    Enhance your AR15 pistol with the AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:7 / 160-829 ODG. This premium upper assembly is designed for optimal performance and durability. The 7.5 barrel is chambered in 5.56 Nato with a 1:7 twist rate, ensuring...

    Was: $399.00
    On Sale $219.00
    Add to Cart
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