You’ve got two approaches to fixing safety wobble:
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Take a consistent-diameter dowel and fashion your own detent; or
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Reprint and step-down the detent hole with multiple bits. You want to run a smaller-diameter bit through it that corresponds to the smaller diameter of the detent, then a larger one just deep enough to let the detent present to the cam properly without overextension. I forget which bits you need, but they’re common imperial sizes
There are one or two remixes for the SF5, but no major forks of it. Can try a monolithic lower or tapered handguard if you’d like.










you a real one <3