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, 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 $219.00
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  • AR15 Pistol Upper Assembly, 4-inch 9mm firearm component with rail system and black finish.

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

    This AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is built around a 4 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 $219.00
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  • AR15 Pistol Upper Assembly, 5 inch 5.56 Nato with American flag design, showcasing a black finish and tactical features.

    AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / American Flag

    Upgrade your AR15 with our high-performance 5" 5.56 NATO Pistol Upper Assembly, built for compact power and reliable performance. This micro-length upper is designed for durability and precision, making it a great option for close-quarters setups and...

    Was: $359.00
    On Sale $229.00
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  • AR10 12.5" stainless steel .308 upper without handguard, model 160-079, firearm component.

    AR10 12.5" stainless steel .308 upper without handguard 160-079

    The 12.5" Stainless Steel .308 Upper – Without Handguard is an excellent foundation for builders who want full control over their AR-10/LR-308 setup. Featuring a 12.5-inch stainless steel barrel, this upper delivers durability, corrosion...

    Was: $299.00
    On Sale $129.00
  • 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
  • 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 $229.00
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  • 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
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  • 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 $249.00
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  • AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:5 / 160-829 Slime Green, tactical firearm component with slime green accents and accessories.

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

    Enhance your AR15 pistol with the AR15 Pistol Upper Assembly / 7.5" 5.56 Nato / 1:7 / 160-829 Slime Green. 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,...

    Was: $399.00
    On Sale $249.00
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