Mil Spec vs Commercial Buffer Tube: Which One Is Right for Your AR-15?

Understanding Mil Spec vs Commercial Buffer Tube: A Comprehensive Guide

When it comes to upgrading or building your AR-15, one critical decision is choosing the right buffer tube. The debate of mil spec vs commercial buffer tube is common among enthusiasts and professionals alike. At Mounts Plus, we’re here to help you understand the key differences, advantages, and which option might be best for your needs.

What is a Buffer Tube?

Before diving into the comparison, let’s briefly explain what a buffer tube is. A buffer tube, also known as a receiver extension, is a component that houses the buffer and spring, essential for the AR-15’s recoil system. It also serves as the attachment point for the stock.

Key Differences Between Mil Spec and Commercial Buffer Tubes

Dimensions and Specifications

• Mil Spec Buffer Tube:

  • Outer Diameter: Approximately 1.148 inches
  • Threaded Section Diameter: About 1.185 inches
  • Material: Typically made from 7075-T6 aluminum, known for its strength and durability
  • Fit: Tighter tolerances and precise fit with mil spec lower receivers
• Commercial Buffer Tube:
  • Outer Diameter: Approximately 1.168 inches
  • Threaded Section Diameter: About 1.170 inches
  • Material: Often made from 6061-T6 aluminum, which is slightly less robust than 7075-T6
  • Fit: Slightly larger diameter and different threading, designed for commercial-spec lower receivers

Advantages of Mil Spec Buffer Tubes

1. Durability: Made from higher-grade aluminum (7075-T6), mil spec buffer tubes offer superior strength and longevity.
2. Compatibility: Ensures a precise fit with mil spec lower receivers, reducing the risk of wobble or misalignment.
3. Versatility: More aftermarket stocks are designed to fit mil spec buffer tubes, offering a wider range of customization options.

Advantages of Commercial Buffer Tubes

1. Cost-Effective: Typically, commercial buffer tubes are less expensive than their mil spec counterparts.
2. Ease of Use: The slightly larger diameter can make installation and adjustments easier for some users.
3. Adequate Performance: For most civilian applications, a commercial buffer tube provides sufficient durability and performance.

Choosing Between Mil Spec and Commercial Buffer Tubes

The decision between mil spec vs commercial buffer tube largely depends on your specific needs and preferences. Here are a few considerations to help you decide:

• Purpose: For professional or tactical use, mil spec buffer tubes are generally preferred due to their robustness. For recreational shooting or budget builds, commercial buffer tubes can be a practical choice.
• Compatibility: Ensure the buffer tube matches your lower receiver’s specifications to avoid fitment issues.
• Customization: If you plan on frequently customizing your AR-15 with different stocks and accessories, a mil spec buffer tube may offer more options.

Installation and Maintenance Tips

Installing a buffer tube is a straightforward process, but it’s crucial to follow the manufacturer’s instructions carefully. Regular maintenance, including cleaning and inspection, ensures your buffer tube and the entire recoil system function reliably.

Testimonials

Mark T. "Switching to a mil spec buffer tube was the best upgrade for my AR-15. The fit is perfect, and the durability is unmatched. Thanks, Mounts Plus!"

Jessica L. "I went with a commercial buffer tube for my budget build, and it’s been great. Easy to install and performs well at the range."

FAQs

What is the main difference between mil spec and commercial buffer tubes? The main differences are in their dimensions and materials. Mil spec buffer tubes have tighter tolerances and are made from stronger aluminum, while commercial buffer tubes have a slightly larger diameter and are typically more cost-effective.

Can I use a commercial buffer tube with a mil spec lower receiver? No, it’s important to match the buffer tube with the corresponding lower receiver specification to ensure proper fit and function.

Are mil spec buffer tubes worth the extra cost? For many users, the enhanced durability and compatibility of mil spec buffer tubes justify the higher price, especially for professional or heavy-duty use.

How do I know if my AR-15 has a mil spec or commercial buffer tube? Measure the diameter of the buffer tube. Mil spec tubes have an outer diameter of approximately 1.148 inches, while commercial tubes are around 1.168 inches.

Which type is better for customization? Mil spec buffer tubes typically offer more aftermarket stock options, making them a better choice for those who like to frequently customize their AR-15.

Conclusion

Choosing between a mil spec vs commercial buffer tube depends on your needs and budget. Mil spec buffer tubes offer superior strength and compatibility, making them ideal for demanding use. Commercial buffer tubes provide a cost-effective and adequate option for many civilian shooters. At Mounts Plus, we provide high-quality buffer tubes and accessories to suit every AR-15 build. Explore our selection and upgrade your AR-15 today!

 

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