It can be preset with staking or soldering. A little merchandise is that the pin which retains the firing pin spring cap tended to work loose, and had to be tapped back in place as one observed it challenge within the rear with the bolt. Winchester replaced that pin in https://highimpactrounds.com/product/winchester-super-x-12-ga-2-75in-1-oz-8-lead-1290-fps-25-rd-box/