Savage factory steel SA centerfeed DBM frame (top bolt release): https://store.savagearms.com/frame-a...matte-dbm.html
Savage factory steel matte triggerguard (top bolt release): https://store.savagearms.com/trigger...-matte-at.html
Steel frame DBM steel magazine bottom: https://store.savagearms.com/mag-bot...matte-dbm.html

You can simply purchase the steel magazine bottom and install that on the mag well/follower that came with your rifle.