These will have 10 round mags. Here are the CO compliant AR 15 s that buds has budsgunshop.com/catalog/advanced_search_result.php?keywords=Co+compliant+ar+15

From Buds it has to have a compliant magazine as Buds will not alter the firearm most manufacturers make and package "compliant guns" with 10 round mags if you have a specific model in mind post it and we may be able to help you

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Hi Kevin, No Unfortunately Buds won't alter firearms to make them state compliant. I wish they would!

You can't from Buds as they do not open new firearm packages or alter accessories. The firearm must be compliant from the manufacturer. I wish they would but they don't.