Pistol Uppers

Pistol uppers are a key component in building a compact and versatile AR-style pistol. Designed to attach seamlessly to a pistol lower receiver, these uppers house the barrel, bolt carrier group, and other essential parts that define your firearm’s performance. The shorter barrel length makes pistol uppers ideal for lightweight builds, maneuverability, and close-range use, without sacrificing reliability.

At AR15-Overstock.com, we carry a wide range of AR pistol uppers, to suit any build preference. From micro 5-inch uppers for ultra-compact designs to longer pistol-length options, our inventory includes multiple calibers, handguard styles, and finishes. Whether you’re customizing a personal defense pistol or building a unique range setup, finding the right pistol upper is essential to creating the performance and handling you want.

Shop high-quality pistol uppers today at AR15-Overstock.com and take the first step toward your ideal AR pistol build.

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

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

    The AR15 Pistol Upper Assembly in White offers exceptional quality and performance. This 5 barrel assembly is chambered in 5.56 NATO with a 1:5 twist rate, ensuring optimal accuracy and stability. The sleek white finish adds a modern touch to your...

    Was: $389.00
    On Sale $239.00
  • AR15 Pistol Upper Assembly / 5" 5.56 Nato / 1:5 / 160-819 Slime Green

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

    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: $389.00
    On Sale $239.00
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