Might seem simple enough to most, but when it comes to building your own rifle, choosing between an AR-10 and an AR-15 is one of the most important decisions you’ll make. Both platforms offer excellent performance, but they are designed for different applications. Whether you’re considering an 80 lower for your next build or just curious about these rifles, understanding their differences will help you make the right choice.

Caliber Differences

The most noticeable difference between the AR-10 and AR-15 is the caliber they are designed to handle.

• AR-10: Usually chambered in .308 Winchester or 7.62x51mm NATO, providing more stopping power and range.
• AR-15: Most commonly chambered in 5.56x45mm NATO or .223 Remington, making it lighter and easier to shoot.

If you’re looking for a rifle with better long-range capabilities, the AR-10 is a solid choice. However, for general target shooting and home defense, the AR-15 is more practical. We recommend talking in more depth to your local shop owner fo rmore details.

Size and Weight

The AR-10 is the bigger and heavier of the two rifles. This is due to the larger caliber and reinforced construction needed to handle the increased power.

• AR-10: Larger and heavier, usually around 8-10 lbs without accessories.
• AR-15: More compact and lightweight, typically weighing around 6-7 lbs.

If you plan to carry your rifle for extended periods, such as during hunting or tactical training, the lighter AR-15 may be the better option. However, there are many modifications you can do to both to make them easier to handle and lighter to carry. It’s all about personal preference!

Parts Compatibility and Customization

One of the biggest advantages of the AR platform is its modularity. However, AR-10 parts are generally not interchangeable with AR-15 parts. Do your research before purchasing a part!

• AR-10: Fewer standardized parts; different manufacturers may have proprietary designs.
• AR-15: Highly standardized, with a vast selection of compatible parts and accessories.

If you love customizing and want to make your rifle truly “one-of-a-kind” then the AR-15 offers more flexibility with aftermarket parts and 80 lower options.

Recoil and Shooting Experience

The AR-10’s larger caliber produces more recoil, while the AR-15 is easier to handle.

• AR-10: More recoil due to the .308 round, which can affect follow-up shot speed.
• AR-15: Lower recoil, making it easier to shoot accurately and comfortably.

Overall, the AR-15 is generally a more forgiving platform.

Use Cases: Which One is Right for You?

Choosing between an AR-10 and an AR-15 depends on your specific needs:

• Choose an AR-10 if: You need long-range power for hunting or precision shooting.
• Choose an AR-15 if: You want a lightweight, versatile rifle for home defense, range shooting, or competitions.

If you’re looking to start your build with an 80 lower, make sure to choose the right platform that fits your shooting style and needs. Check out our selection and start your custom build today!