Guntec USA AR10 Complete Buffer Tube Kit – .308, 6-Position

The Guntec USA AR10 Complete Buffer Tube Kit (brand part number MILTUBESET-308) gives .308-caliber AR10 builders everything needed to mount a carbine stock in one box, instead of sourcing a tube, buffer, spring, end plate, and castle nut separately. Guntec USA machines the six-position mil-spec buffer tube from T6 aluminum and pairs it with a 308 CAR short buffer and spring sized specifically for .308 platforms, along with the end plate and castle nut needed for a complete, ready-to-assemble kit. At roughly 11 ounces for the full kit, it’s a straightforward, made-in-the-USA foundation for any AR10 stock installation or receiver extension swap.

Key Specifications

• Built for .308-caliber AR10 platforms.
• Uses a six-position mil-spec buffer tube.
• Machined from T6 aluminum for a durable, lightweight tube.
• Includes a 308 CAR short buffer and spring sized for .308 platforms.
• Includes the end plate and castle nut needed for a complete install.
• Weighs approximately 11 ounces for the full kit.
• Made in the USA.

Frequently Asked Questions

Does this kit include everything needed to install a stock? Yes, it includes the buffer tube, buffer, spring, end plate, and castle nut.

What caliber is this sized for? .308-caliber AR10 platforms, using a 308 CAR short buffer and spring.

Buy the Guntec USA AR10 Complete Buffer Tube Kit – .308, 6-Position

Get every part you need for your next AR10 stock install in one kit. Order it from our Guntec USA lineup, part of our AR buffer system selection, at our Lubbock, Texas gun shop for fast, direct shipping.