It may be fixed with staking or soldering. A small product is that the pin which retains the firing pin spring cap tended to work unfastened, and needed to be tapped back again in place as 1 observed it job through the rear from the bolt. Winchester replaced that pin https://highimpactrounds.com/product/winchester-defender-segmented-slug-12-ga-2-75-in-1-oz-1600-fps-10-rd-box/