Cobalt A5-Ckh2 A5-Ck Buffer H2(5.33 Oz)

The Cobalt Kinetics A5-CKH2 buffer is a purpose-built AR-15 recoil management component engineered to fine-tune your rifle's performance. If you're running an A5 receiver extension and looking to dial in your gun's cycling characteristics, this H2-weight buffer offers a heavier mass than standard AR buffers, which can help smooth out recoil impulse and reduce bolt carrier group speed for more predictable operation across different ammunition loads and suppressor configurations.

Built from black anodized aluminum, the A5-CKH2 is designed to work within the A5 buffer tube system—a platform favored by shooters who want flexibility in tuning without swapping entire stocks or receiver extensions. At 5.33 ounces, this H2 variant sits in the mid-to-heavy range of AR buffer weights, making it a solid choice for suppressed shooting, softer recoil management, or situations where you want tighter bolt lockup timing. Whether you're optimizing a precision rifle, a suppressed carbine, or just experimenting with your AR's balance, having the right buffer weight matters.

Cobalt Kinetics focuses on reliability and shootability, and their buffer components reflect that philosophy. This isn't a radical upgrade—it's a straightforward, functional tool for shooters who understand that buffer selection is part of tuning your rifle correctly.

Key Features

• H2 weight (5.33 oz) for heavier recoil impulse management
• Black anodized aluminum construction
• Designed for A5-pattern receiver extensions
• Reduces bolt carrier group speed for smoother cycling

Specifications

Frequently Asked Questions

Is this buffer compatible with my AR-15?

The Cobalt A5-CKH2 is designed for rifles with A5-pattern receiver extensions (also called A5 buffer tubes). If your AR uses a standard carbine receiver extension, you'll need a standard-size buffer instead. Check your current buffer tube to confirm which system you have.

What's the difference between H2 and other buffer weights?

The H2 designation means this buffer weighs 5.33 ounces—heavier than standard buffers. Heavier buffers slow the bolt carrier group's rearward travel, which can reduce felt recoil, help with suppressed rifle cycling, and improve reliability with a wider range of ammunition.

Why would I upgrade my buffer?

Buffer selection helps tune your rifle's reliability and shootability. If you're running a suppressor, shooting subsonic ammunition, using a short barrel, or just want to reduce recoil impulse, the right buffer weight can make a real difference in how your gun feels and functions.