Q&A for Maxim Defense Industries CQB Buffer & Spring Set

Maxim Defense Industries CQB Buffer & Spring Set

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Jeff, member, from GA, United States, asked on August 19, 2020

which would I use on a 7.5in barrel ar15 223/556?

Expert Answer

Answered by Ben, Gear Expert, from UT, United States, on March 05, 2021

I would recommend the H3.

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Jim, member, from MN, United States, asked on November 08, 2022

Will these buffers/springs work with "Maxim Defense Industries PDW Brace for AR-15, Standard Buffer/Spring, 3.3 oz, FDE, MXM-47525"?

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on November 11, 2022

These Maxim Defense Industries CQB Buffer & Spring Sets will not work with the Maxim Defense Industries PDW Brace for AR-15 that uses the standard AR15 buffer assembly.

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Eddie, member, from IN, United States, asked on September 18, 2022

Will this fit a milspec buffer tube?

Expert Answer

Answered by Ethan, Gear Expert, from IL, United States, on September 26, 2022

No, the Maxim Defense Industries CQB Buffer & Spring Set is designed specifically for the Maxim Defense CQB Stock. You need standard carbine length springs and buffers for mil-spec carbine length tubes.

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David Brown, member, from DE, United States, asked on July 13, 2022

12.5” .556 ar15. Bought the CQB PDW came with a 7.6oz. When I pull the charging handle bolt won’t lock back on empty mag. What size buffer do I need

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on July 28, 2022

Please email us at techsales@opticsplanet.com. There may be another issue than just the buffer assembly so if we could get more information it may be helpful in finding what you need to fix the issue.

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J, member, from TX, United States, asked on June 29, 2022

Recommendation for 300 Blk 6" Barrel with Fostech Echo trigger?

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on July 19, 2022

I recommend using the H2 or H3 model of the Maxim Defense Industries CQB Buffer & Spring Set. However, be aware that these Maxim Defense Industries CQB Buffer & Spring Sets are only compatible with the Maxim Defense CQB stock.

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Fatnipples, guest, from MA, United States, asked on April 26, 2022

Doing a 300BLK with a 7.5 bar. The Maxim website recommends an H1 weight. Want to confirm that is the recommendation

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on May 20, 2022

Maxim Defense does recommend an H1 for a 7.5" barrel 300 Blackout. I recommend following Maxim Defense's recommendation but you could probably use an H2 model as well.

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Chase Hodges, member, from AR, United States, asked on September 05, 2021

Will this work with a viper pdw brace for 300 blackout?

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Answered by Tom B, Gear Expert, from IL, United States, on September 23, 2021

Most likely, it would work, but this is designed to be used with the Maxim CQB

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Al, member, from GA, United States, asked on May 10, 2021

Any suggestions on a 556 lower with a 10.5 upper

Expert Answer

Answered by Tom B, Gear Expert, from IL, United States, on September 01, 2021

You would want the H1 buffer. MDI-RBF-CQBBS-MXM-47565

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SKOT, member, from TX, United States, asked on April 21, 2021

Does this work with the maxim CCS Brace?

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Answered by Tom B, Gear Expert, from IL, United States, on September 01, 2021

Yes, these will work with the CCS braces.

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Adam M, member, from TX, United States, asked on February 24, 2021

It’s states for use with the CQB but does it also work with the maxim PDW brace as well?

Expert Answer

Answered by Ben, Gear Expert, from UT, United States, on March 05, 2021

Yes, they should be able to work together.

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Q&A for Maxim Defense Industries CQB Buffer & Spring Set — 39 Questions & 29 Answers