Original G.I. Issue 30 round magazines.
These magazines are pre 1994 production meaning they are grandfathered-in for states like California, Massachusetts and New York.
Magazines have been upgraded with anti-tilt followers and Magpul Ranger Plates.
$65 a piece
$300 or 5
All laws followed.
https://www.vantagedefense.com/product/preban-magazine/