LBE Unlimited H2BUFKT Buffer Tube Kit Black AR-Style

An AR-platform buffer tube kit pulls together the core components you need to complete or refresh the rear end of your rifle build. The LBE Unlimited H2BUFKT Buffer Tube Kit supplies the working parts in one package: a mil-spec diameter buffer tube, H2 heavy recoil buffer, carbine-length recoil spring, receiver end plate, and castle nut. Whether you're assembling your first AR or swapping out worn internals on an existing rifle, having these pieces spec'd and ready saves you the guesswork of sourcing them individually.

The H2 buffer is the heavier option in the standard buffer lineup, designed to moderate recoil impulse and cycle control—useful if you're running a rifle tuned for specific loads or simply want a smoother shooting experience. The carbine-length spring pairs with the H2 to create a balanced system. All components meet mil-spec standards for diameter and fit, so you're not working around proprietary tolerances or assembly surprises.

This kit covers the essentials without extras you don't need, keeping the focus on solid, dependable parts. LBE Unlimited manufactures with an eye toward durability and function—the kind of components that earn trust through straightforward design and consistent performance in the field, at the range, or in your workshop.

Key Features

• H2 heavy recoil buffer for controlled cycling and reduced felt recoil
• 6-position mil-spec buffer tube for stock versatility
• Carbine-length recoil spring matched to H2 buffer dynamics
• Mil-spec receiver end plate and castle nut for secure assembly
• All components sourced and packaged as a complete kit

Specifications

Frequently Asked Questions

What AR platform rifles does this buffer tube kit fit?

This kit is designed for standard AR-style rifles using mil-spec buffer tube diameter and components. The 6-position tube and mil-spec end plate and castle nut follow industry standard dimensions, making it compatible with most direct-impingement and piston AR platforms that accept mil-spec parts.

What does the H2 buffer mean and when would I use it?

The H2 is a heavy buffer that slows the recoil cycle compared to a standard buffer. Shooters often choose it to reduce felt recoil, control bolt velocity, or tune a rifle's function with specific ammunition or tuning goals in mind.

Is this kit complete for a new build?

This kit includes the essential internals and hardware—buffer, tube, spring, end plate, and castle nut. You'll still need a stock to mount on the buffer tube and a lower receiver assembly to complete your build.

Do these parts meet mil-spec standards?

Yes. The buffer tube, end plate, and castle nut are all mil-spec diameter and specification, ensuring they work with standard AR parts and assemblies.