It may be fixed with staking or soldering. A little item would be that the pin which retains the firing pin spring cap tended to work unfastened, and had to be tapped again in place as a single saw it job from your rear in the bolt. Winchester replaced that https://highimpactrounds.com/product/winchester-m193-5-56-nato-55-gr-fmj-3180-fps-200-rd-box/