Rem 700 build

So Scott’s lightweight build has got me all hot and bothered. I now have a new itch to scratch.
I’ll be planning to build something similar to his but on a Remington 700 SA action.

My current setup has a blind mag (5 rounds) which is fine for general hunting, and easy to carry without a mag protruding.

This is all well and good, but I also do a bit of spotlighting for wallabies down here.

My question is this:

Is there a bottom metal that can take flush mags (for when I’m carrying in the hills) that I can also get an extended 10 round mag for when I’m spotlighting in the truck?

Appreciate your thoughts.

Stupid double up post. Apologies about that.