When it comes to building a compact and versatile firearm, the AR-15 pistol upper is one of the most popular and effective components available. Whether you're a first-time builder or a seasoned enthusiast, choosing the right upper can make all the difference in performance, reliability, and style.

What is an AR-15 Pistol Upper?

An AR-15 pistol upper is the top half of a pistol-style AR build. It typically features a shorter barrel (under 16”), a gas system designed for short operation, and no stock—allowing the firearm to be classified as a pistol under federal regulations. It’s ideal for shooters who want a compact platform for home defense, truck carry, or range fun.

Benefits of Using an AR-15 Pistol Upper

• Compact Size: Great for maneuverability in tight spaces.

• Customization: Available in various barrel lengths, handguard styles, and Cerakote finishes.

• Compatibility: Easily mounts to any standard AR-15 lower.

• Performance: Despite its size, many uppers offer impressive accuracy and reliability.

Why Shop AR-15 Pistol Uppers at AR15-Overstock.com?

At ar15-overstock.com, we stock a wide range of AR-15 pistol uppers, including:

• Forged and billet options for different durability needs

• Cerakote finishes for a custom look—choose from solid colors to unique splatter patterns

• M-LOK and KeyMod handguards to support all your favorite attachments

• Caliber choices like 5.56 NATO, .300 Blackout, and 7.62x39

Plus, you can often find deals like 10% off sitewide with code SAVE10, or free gear with select kits.

Build It Your Way

Whether you're building a new pistol from scratch or upgrading an existing one, your upper is the heart of your AR. Browse our selection and find the perfect match for your setup today.