If you're looking to build a compact, versatile, and hard-hitting firearm, an AR-15 pistol upper is the perfect place to start. At ar15-overstock.com, we offer a wide range of high-quality pistol uppers to help you customize your build with performance and reliability in mind.

What Is a Pistol Upper?

A pistol upper is the upper receiver assembly used on AR-15 pistols. These uppers typically feature shorter barrels—ranging from 5.5” to 10.5”—making them ideal for compact builds. Just like a rifle upper, they include:

• Barreled upper receiver

• Handguard

• Gas system

• Muzzle device (in most cases)

• Optional BCG and charging handle

These components are designed for use with a pistol-designated lower receiver, allowing you to stay compliant while creating a more maneuverable platform.

Why Choose a Pistol Upper?

1. Compact and Lightweight

AR-15 pistols built with shorter uppers are easier to maneuver in tight spaces, making them ideal for home defense, truck guns, or range training. If you're looking for a lightweight build that still delivers serious performance, a pistol upper is the answer.

2. Customization Options

From different barrel lengths and calibers (like 5.56, .300 Blackout, or 9mm) to rail styles and finishes, pistol uppers come in a wide range of configurations. You can build exactly what you want, with the performance and aesthetic that suits you.

3. Easy Installation

Swapping or upgrading your upper is one of the simplest ways to modify your AR-15 pistol. All of our uppers at ar15-overstock.com are drop-in ready and compatible with mil-spec lowers, so you can get up and running fast.

4. Legal Simplicity

As long as you’re building on a lower that's registered as a pistol and following all applicable laws, building with a pistol upper keeps you compliant without the complexities of NFA registration.

Why Buy from ar15-overstock.com?

We’re dedicated to offering affordable, high-quality AR-15 pistol uppers you can depend on. Whether you're looking for a 7.5" 5.56 setup or a .300 Blackout upper for suppressed shooting, we have options in stock and ready to ship.

Here’s what sets us apart:

• Competitive pricing with frequent discounts and bundle deals

• Trusted components from reputable manufacturers

• Fast shipping and responsive customer support

• Exclusive offerings, including mystery boxes and limited-run models

Upgrade Your Build Today

Your AR-15 pistol is only as good as the upper you put on it. Explore our selection of AR-15 pistol uppers now at ar15-overstock.com and find the right fit for your next build.