Safety inspection regarding open wheel shooters?

[Siri]

I don't know of any Hatboro Horsham robots that had to put on guards. We certainly did not.

I've Q&A'd a request for more guidance. (Not that I have overly high hopes) We're squeezing ounces, but we certainly want to be safe (and legal). A "finger guard" is doable if useful, but if LRIs feel that shatter guards are necessary, that could be some serious practice night rework (and weight). What is the guard intended to actually do, and how can it best do so while avoiding pinch points?