The Maxim Defense CQB Gen 2 Buffer and Spring in H2 weight (brand part no. MXM47566) is a matched buffer-and-spring set built for Maxim Defense’s CQB recoil system, a compact platform designed around short-barrel AR pistols and SBRs. Maxim Defense built its reputation on solving the reliability problems that come with running an AR platform on a very short gas system, and this buffer and spring pairing is tuned specifically for that application rather than being a generic drop-in part. The H2 weight adds mass over a standard carbine buffer, which helps control bolt bounce and felt recoil on a short-barrel gun running a high-pressure cartridge. Buying the buffer and spring together ensures the two components are matched for correct cycling instead of guessing at spring rate separately.

Key Specifications

• Built specifically for the Maxim CQB recoil system rather than as a generic AR buffer.
• Weighted at H2, heavier than a standard carbine buffer to help control bolt bounce on short-barrel guns.
• Sold as a matched buffer and spring set, so the two parts are tuned to work together.
• Built for short-barrel AR pistols and SBRs, platforms that put extra strain on a standard recoil system.
• Added buffer mass helps manage felt recoil and bolt velocity on guns running a very short gas system.

Frequently Asked Questions

What does the H2 weight mean? It’s a heavier-than-standard carbine buffer weight, used to slow bolt velocity and reduce bolt bounce on short-barrel guns.

Does this work with any AR buffer tube? It’s built for Maxim Defense’s CQB recoil system specifically, so it’s intended to pair with that platform rather than a standard buffer tube.

Why buy the buffer and spring together instead of separately? Buying them as a matched set ensures the weight and spring rate are tuned to work together for reliable cycling.

Buy the Maxim Defense CQB Gen 2 Buffer and Spring

Order the Maxim Defense CQB Gen 2 Buffer and Spring in H2 weight from our Lubbock, Texas gun shop for fast, direct shipping. It’s the right way to keep a short-barrel AR cycling reliably instead of fighting bolt bounce. Browse more AR buffer system parts from Maxim Defense Industries.