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So this will fit on a mil spec Ar15 lower and designed for 5.56/223? Able to properly cycle a 5” barrel with included buffer and spring? — 1 Answer

by john, from CA, United States Asked on November 14, 2020

Name Maxim Defense Industries CQB Stock Gen 6 for AR-15 (4.9)
As Low As $299.95 Save Up to 19%
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Answered by Brandon, member, from UT, United States, on January 21, 2021

Maxim Defense makes CQB and PQD stocks and braces that all have the same general design. This product is a stock and can only be mounted on firearms with barrels +16" in length. Mounting this Maxim CQB stock on firearms with barrels shorter than 16" will change the NFA classification of your firearm and make it subject to further NFA regulation.

For a 5" barrel, check out the Maxim Defense CQB Pistol PDW Brace - it uses a standard BCG in conjunction with the proprietary Maxim buffer and buffer spring included with the brace.
https://www.opticsplanet.com/maxim-defense-industries-cqb-pistol-pdw-brace-for-ar15-hxcvq.html

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Last updated 2025-11-12 UTC.