It might be fixed with staking or soldering. A small merchandise is that the pin which retains the firing pin spring cap tended to operate loose, and needed to be tapped back in place as one particular noticed it undertaking from the rear in the bolt. Winchester replaced that pin https://highimpactrounds.com/product/winchester-defender-12-ga-2-75in-1-oz-rifled-slug-00-buck-1150-fps-10-rd-box/