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 again in place as a person noticed it project within the rear on the bolt. Winchester replaced that pin https://highimpactrounds.com/product/winchester-sxp-extreme-defender-12-ga-18-in-gray-black-camo-furniture-perma-cote-finish-pistol-grip-stock/