It does, but it will convert it to AICS pattern magazines, and you will have to buy a 3rd party mag because the Hunter stock currently only comes with a 7.62x51 mag.
Magpul is supposed to release an AICS pattern 5.56 magazine "summer 2020" so I would imagine they will probably create a different SKU for the stock that you can order that includes the 5.56 mag instead.