The various magazine configurations have me a bit confused...

I'm waiting on a stockys carbon stock for my 16 LWH. The original stock has the molded in magazine well, and uses the tabbed axis type magazines like these:
https://gunmagwarehouse.com/savage-a...-magazine.html

With the new stock will I need a new trigger guard along with the new bottom "metal":
https://eabco.com/savage-short-actio...-bottom-metal/

And will my magazines be compatible, or do I need to change to this type:
https://gunmagwarehouse.com/savage-a...-magazine.html

Thanks all