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Commercial Buffer Tube – AR-15 Receiver Extension for Budget & Utility Builds

Looking for a reliable way to complete your AR-15 build without breaking the bank? A commercial buffer tube offers a durable and cost-effective solution — especially for general-purpose or training rifles. Whether you're building from scratch or replacing a worn-out stock setup, this receiver extension gives you the strength and compatibility you need.

Compatible with AR-15 and M4 pattern rifles, our commercial-spec buffer tubes are engineered for smooth cycling, proper fit, and long-lasting performance.

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🔧 Key Features of Our Commercial Buffer Tubes

• Commercial-Spec Diameter – Designed for use with commercial-sized collapsible stocks
• 6061-T6 or 7075 Aluminum – Lightweight yet strong, built to handle recoil and field conditions
• Hardcoat Anodized Finish – Corrosion-resistant and ready for rugged use
• Six-Position Design – Adjustable length of pull to match shooter preference
• Drop-In Fit – Compatible with standard carbine buffer springs and AR-15 buffer assemblies

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🆚 Commercial vs. Mil-Spec Buffer Tubes

While both tubes perform similar roles, their diameters differ slightly. A commercial buffer tube has a slightly larger outer diameter and a slanted rear edge. Mil-spec stocks will not fit securely on a commercial tube — be sure to pair the correct stock with your chosen tube spec.

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⚙️ Perfect For:

• Budget AR builds
• Entry-level or training rifles
• Field-use or backup carbines
• Non-mil-spec aftermarket stock installations

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🏷️ Popular Commercial-Spec Buffer Tube Options

• VISM AR-15 Commercial Buffer Tube – Lightweight and affordable
• ATI Commercial-Spec Tube Package – Includes castle nut and end plate
• FAB Defense Commercial Stock + Tube Combo – Great for all-in-one upgrades

All options are backed by our satisfaction guarantee and fast shipping from Mounts Plus.

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💬 FAQ

Q: What’s the difference between a commercial and a mil-spec buffer tube?
A: The main difference is the outer diameter and shape. Commercial tubes are slightly larger and have an angled rear edge, while mil-spec tubes are slightly smaller with a flat back.

Q: Can I use a mil-spec stock on a commercial buffer tube?
A: No. Mil-spec stocks typically won’t fit properly on commercial buffer tubes. Always match the stock type to the buffer tube spec.

Q: Are commercial buffer tubes durable enough for regular shooting?
A: Yes. Quality commercial tubes made from 6061-T6 or 7075 aluminum are strong and reliable for training, recreational, and even field use.

Q: Will this work with my AR-15 or M4 carbine?
A: Yes. As long as you use a commercial-spec collapsible stock, it will work with standard AR-15 lower receivers and carbine-length buffer systems.

Q: What accessories do I need to install a buffer tube?
A: You'll need a castle nut, end plate, buffer spring, and carbine buffer — many of our buffer tube kits include these components.