Thread: Opinions on Howa Mini in .223

And… add two spring washers sized to perfectly fit the action screw holes in the plastic bottom metal.

This means that you are torquing the action screws against metal, and the lack of metal-on-plastic twist under tension on the plastic surface means that you don’t indent the plastic and eventually crack it. The washers need to be quite a tight fit in the factory holes so they don’t turn.