Argh,
I just emailed Brownell's about their terminology. For the love of god, it is not a High Capacity Magazine, it is a standard capacity magazine. Despite some states have trampled on the rights of their citizens, the magazine is not high capacity unless it exceeds the design capacity of the OEM. The term should have been stricken from us after the AWB sunset, and the continued use continues to hamper law abiding firearms owners.