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Yes, thought it would come with a catch but no, Only thing is the tension on the spring is greater due to different angle for the spring retainer, plus there is a grub screw that retains the mag...

Got an alloy magazine base plate from Kinneys, cut a 10 shot mag for a flush fit, only holds 3 rounds. A bit of a roughy but works.

DIP Incorporated, it's a metal copy of the plastic Howa bottom plate and trigger guard, uses Howa mags but has a much better mag release system.

Couldn't get anything but plastic when I brought mine, can't find any bottom metal available here. They are $110us, by the time a retailer had them here you'd be in for $300.

Have found an outfit in the states making bottom metal for Howa mini actions BUT they won't ship outside USA.