It might be fixed with staking or soldering. A little product would be that the pin which retains the firing pin spring cap tended to work unfastened, and needed to be tapped again in place as a person observed it challenge from your rear in the bolt. Winchester replaced that https://highimpactrounds.com/product/winchester-aa-12-ga-2-75in-1-1-8-oz-8-lead-1145-fps-25-rd-box/