The Guntec USA AR9 Buffer and Spring Combo (brand part number BUF-SPR-9) is a complete 9mm carbine buffer and spring kit built for Mil-Spec receiver extensions. The 8.2-ounce, 4-inch buffer uses a clear polyurethane bumper over a stainless steel body, paired with a carbine-length, Teflon-coated chrome spring for smoother cycling. It’s made in the USA and drops straight into any Mil-Spec receiver extension.

Key Specifications

• 9mm Carbine Buffer and Spring Combo is a complete kit for AR9 builds.
• 8.2-Ounce Buffer Weight.
• 4-Inch Buffer Length.
• Carbine-Length Chrome Spring.
• Teflon-Coated Finish reduces friction for smoother cycling.
• Clear Polyurethane Bumper over a stainless steel buffer body.
• Mil-Spec Receiver Extension Compatible.
• Made in the USA.

Frequently Asked Questions

Does this fit a standard receiver extension? Yes, it works with any Mil-Spec receiver extension.

How much does the buffer weigh? 8.2 ounces, at 4 inches long.

Buy the Guntec USA AR9 Buffer and Spring Combo

Finish your AR9 build with a Guntec USA Buffer and Spring Combo from our gun parts kits selection. Order online and we will ship it straight from our Lubbock, Texas gun shop.