Some may differentiate tactical stocks and chassis' but, here's a few that accept the bottom bolt release system.
https://mdttac.com/products/hs3-chas...nt=42963880070
https://xlrindustries.com/products/element-chassis
https://www.boydsgunstocks.com/
Boyds has all kinds of stocks available that will accommodate a BBR.
If I may ask, what are you going to do with old stock? If you're interested in offloading it, I'm in the market.
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