It can be fastened with staking or soldering. A small product is that the pin which retains the firing pin spring cap tended to operate loose, and needed to be tapped back in place as just one saw it challenge through the rear of the bolt. Winchester replaced that pin https://highimpactrounds.com/product/winchester-super-target-12ga-2-75in-1-1-8-oz-8-shotshell-1145-fps-25-rd-box/