UTG Pro TLU001KIT Receiver Extension Kit Mil-Spec AR-15 6 position Black Hardcoat Anodized Aluminum Rifle

The UTG Pro TLU001KIT Mil-Spec AR-15 6-Position Receiver Extension Kit gives you a proven, mil-spec compliant alternative to factory buffer tube assemblies. If you're building an AR or upgrading an existing rifle, this receiver extension kit delivers the solid mechanical foundation every AR-15 needs. UTG Pro has engineered this tube to meet military specifications, so it plays well with standard AR furniture and components you'll find at any gun shop or online retailer.

Built from hardcoat anodized aluminum, the TLU001KIT tube handles the daily abuse of range work, training, and hunting without looking beaten up. The black anodize finish resists corrosion and gives your build a clean, professional appearance. Six-position adjustability means you can dial in a length of pull that works for your body mechanics—whether you're running it in tactical gear, a hunting jacket, or just a shirt at the range.

This is a complete receiver extension kit, so you get everything in one box to get your build moving. Mil-spec compatibility ensures seamless integration with standard AR-15 parts and your choice of stocks, buffer springs, and buffer weights. Whether you're assembling an entry-level rifle or swapping out worn furniture on a rifle you know, the UTG Pro TLU001KIT is a straightforward, dependable choice that won't break your budget or your workflow.

Key Features

• Mil-spec design ensures compatibility with standard AR-15 stocks and components
• Six-position adjustability for customized length of pull
• Hardcoat anodized aluminum construction for durability and corrosion resistance
• Complete kit—everything needed for receiver extension assembly
• Black finish integrates cleanly with modern AR platforms

Specifications

Frequently Asked Questions

Is the UTG Pro TLU001KIT compatible with my AR-15 build?

Yes. This is a mil-spec receiver extension kit, which means it meets the military standard for AR-15 buffer tube dimensions and threading. It will work with any mil-spec stock and standard AR-15 components.

What does a 6-position receiver extension do?

The six positions allow you to adjust the length of pull—the distance from the trigger to the rear of the stock—to fit your body and shooting style. You can dial in comfort for different clothing, gear setups, or shooter size.

Is everything I need included in this kit?

Yes, the TLU001KIT is a complete receiver extension kit, so you get the components needed to assemble a functional receiver extension without buying parts separately.

What finish protects the tube in field use?

The receiver extension is finished in hardcoat anodized aluminum, a durable surface treatment that resists corrosion and wear from regular handling, storage, and shooting.