Strike Industries AR-15 Short Pistol Receiver Extension Buffer Tube Kit

The Strike Industries AR-15 short pistol receiver extension buffer tube kit is a compact, purpose-built solution for AR pistols and short-barreled rifles that need to stay nimble without sacrificing reliability. At just over 5 inches long, this kit reduces overall gun length while keeping the cycling dependable—critical when you're running a braced pistol or PDW-style build. It ships complete with everything you need: a tungsten-filled buffer, a flat-wire buffer spring, and the tube itself, so you can get to the range or field without ordering parts separately.

Built from 7075-T6 aluminum, the tube is stronger than standard 6061 alternatives, meaning it'll handle the abuse of regular shooting and carry without premature wear. The anti-rotation tab locks firmly over the buffer retaining plunger, keeping things stable and preventing the kind of minor shift that can throw off your setup. An integral QD socket at the rear makes sling attachment straightforward with quick-detach hardware, a practical detail for hunters, tactical shooters, and anyone who runs a dedicated support strap. The smooth profile design plays nice with aftermarket pistol braces and stabilizers, so if you decide to upgrade down the road, the tube won't get in your way.

Whether you're building a truck gun, a backpack PDW, or maximizing maneuverability in tight spaces, this kit removes guesswork from the buffer tube question. The tungsten buffer and quality spring combo is proven to cycle reliably across common 5.56 and pistol-caliber uppers, so you're not gambling on round count or ammunition brand sensitivity.

Key Features

• Compact 5+ inch length reduces overall gun footprint without compromise
• Tungsten-filled buffer included for reliability and longevity
• Flat-wire spring design for consistent performance
• 7075-T6 aluminum construction for strength and durability
• Anti-rotation tab locks securely to buffer retaining plunger
• Integral QD socket for quick-detach sling attachment
• Smooth profile compatible with popular aftermarket pistol braces and stabilizers

Specifications

Frequently Asked Questions

What comes in the Strike Industries pistol buffer tube kit?

The kit includes the receiver extension tube itself, a tungsten-filled buffer, and a flat-wire buffer spring—everything needed for a complete installation.

Will this tube work with my AR pistol brace or stabilizer?

The smooth profile design is compatible with aftermarket pistol braces and stabilizers. Strike Industries notes it's engineered to work with their Viper Pistol Stabilizer and other popular braces, so check your brace's specs if you have a specific model in mind.

Why 7075-T6 aluminum instead of standard 6061?

7075-T6 aluminum is stronger and more durable than standard 6061, which means the tube resists wear better over extended use and can handle the stresses of regular shooting and carry.

Can I attach a sling to this tube?

Yes. The integral QD socket at the rear of the tube accepts standard quick-detach sling attachments, making it easy to add a support strap for carry and operation.