Longer Mag for 111 actions

[qtropwr]

Does anyone make one for these? Looking to extend the magazine out to 3.800 or so to allow for longer bullets in a 300 Rum.

[Dave Hoback]

https://accurate-mag.com/shop/magazines/300-remington-ultra-mag-sssf-magazine/

[qtropwr]

Thank you, looks like I'll need the bottom metal too, mines an internal mag.