Originally Posted by
gundoc
Broken bolt stops can be cured by putting a steel shim washer in the front of the stop to make it a snug fit in the receiver and prevent twisting when the bolt makes contact. I would also recommend having a new stop machined from solid steel and properly heat-treated for toughness, rather than use the replacement investment-cast ones. Investment casting is a quick and economical way to make acceptable parts, but is still not as good as properly made (albeit slower and more expensive) parts.