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Commercial Buffer Tube – AR-15 Receiver Extension
Commercial Buffer Tube – AR-15 Receiver Extension for Commercial Stocks
Looking for a reliable and affordable way to complete your AR build? The commercial buffer tube offers a solid solution for those using commercial-diameter adjustable stocks. Whether you're assembling a budget-friendly rifle or replacing a worn-out tube, this component is a key part of your recoil system and stock interface.
At Mounts Plus, we offer commercial buffer tubes made from high-grade aluminum, hardcoat anodized for durability and corrosion resistance. Designed to work with most commercial-spec carbine stocks, these tubes are easy to install and compatible with AR-15, M4, and other similar platforms.
Key Features of Our Commercial Buffer Tubes
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✅ Commercial-Spec Diameter – Compatible with commercial-sized collapsible stocks
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✅ 6061-T6 or 7075 Aluminum – Lightweight and durable construction
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✅ Hardcoat Anodized Finish – For long-term wear resistance
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✅ Six Position Design – Allows adjustable length of pull
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✅ Drop-In Installation – Works with standard buffer springs and carbine buffers
Commercial vs. Mil-Spec Buffer Tubes
| Type | Best Use | Features |
|---|---|---|
| Side Saddle Mounts | Tactical / Home Defense | Mounts directly to the receiver or rail |
| Stock-Mounted Holders | Field / Hunting | Rubber or elastic wrap-around design |
| Velcro Shell Cards | Competition / Speed Reloading | Removable, modular, low-profile |
| Sling Shell Holders | Tactical carry + shell storage | Combines sling and ammo retention |
⚠️ Be sure to use the correct stock for your buffer tube type—Mil-Spec and Commercial stocks are not interchangeable.
Compatible Platforms
- AR-15 Carbines
- M4 Clones
- Pistol-caliber carbines (PCCs)
- Commercial-diameter adjustable stocks
Installation Notes
- Uses standard castle nut and end plate
- Compatible with carbine buffer and buffer spring
- No special tools required for basic installation
🧠 FAQs – Commercial Buffer Tubes
Q: What is the difference between a commercial and Mil-Spec buffer tube?
A: Commercial buffer tubes are slightly wider in diameter and have an angled rear end. Mil-Spec tubes are smaller in diameter with a flat rear. They require different stock sizes.
Q: Can I use a Mil-Spec stock on a commercial buffer tube?
A: No. Mil-Spec stocks will not fit properly on a commercial buffer tube and may be too tight or incompatible. Always match the stock to the buffer tube spec.
Q: Are commercial buffer tubes less durable than Mil-Spec?
A: While Mil-Spec tubes are generally made from 7075-T6 aluminum, many commercial tubes are still durable and reliable—especially for recreational or budget builds.
⭐ Customer Reviews
“Solid quality and easy to install.”
“Used this tube for a training carbine build. Fit my commercial stock perfectly and has held up through 1,000+ rounds.” – Randy P.
“Exactly what I needed.”
“Simple, affordable, and did the job right. Don’t overpay when you don’t need Mil-Spec tightness.” – Erica S.
Buy Commercial Buffer Tubes at Mounts Plus
If you're building a general-purpose AR-15 or upgrading a factory setup, our commercial buffer tubes offer the right balance of price and performance. Built for function and field use, they're ready for your next rifle build or replacement project.
Trusted parts. Fast shipping. Proven performance since 1994.
Order your commercial buffer tube today and complete your build with confidence.