It may be preset with staking or soldering. A little item would be that the pin which retains the firing pin spring cap tended to work free, and had to be tapped back again in place as one particular saw it job in the rear of your bolt. Winchester replaced https://highimpactrounds.com/product/winchester-ammunition-long-beard-xr-20-gauge-3in-6-1-1-4-oz-shot-lok-lead-1000fps-10-rd-box/