That is absurd. The angles where Oswald's shots were fired are well documented.
This book is good:
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www.amazon.com
Read about the difference between frangible ammo - as was used in the AR-15 - and what Oswald used, which was full metal jacket. And look at the kill shot to JFK, vs the initial wounds to JFK (neck) and Connally.
Not at all implausible. You laughing it off doesn’t make it any less so.