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" 5.56 Nato / 1:5 / 160-819 ODG

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

    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: $389.00
    On Sale $239.00
    Add to Cart
  • AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-819 Red

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

    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
    Add to Cart
  • AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-819 Pink

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

    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: $389.00
    On Sale $239.00
  • Upper Mystery Box

    Upper Mystery Box

    Unveil the ultimate thrill with our Upper Assembly Mystery Box! Packed with premium treasures, this curated collection elevates the mystery experience. Expect higher-value items, exclusive finds, and a touch of luxury in every unboxing. Perfect for...

    $169.00
    Add to Cart
  • AR15 Pistol Upper Assembly, 4-inch 9mm with American flag design, black finish, and tactical rail.

    AR15 Pistol Upper Assembly / 4" 9mm / American Flag / 160-499

    This AR-15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is built around a 4-inch, 4150 chrome moly barrel with a durable black nitride finish for enhanced corrosion resistance and longevity. The upper receiver features...

    Was: $359.00
    On Sale $195.00
    Add to Cart
  • 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: $359.00
    On Sale $195.00
    Add to Cart
  • 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: $359.00
    On Sale $219.00
    Add to Cart
  • 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: $359.00
    On Sale $195.00
    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: $359.00
    On Sale $209.00
    Add to Cart
  • 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: $359.00
    On Sale $195.00
    Add to Cart
!