It may be set 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 back again in place as a single saw it project within the rear in the bolt. Winchester replaced https://highimpactrounds.com/product/winchester-super-target-12ga-2-75in-1-1-8-oz-8-shotshell-1145-fps-25-rd-box/