Uncorroborated testimony is inherently weak.
Brutal being left with only Marina to support your fantasy.
Oh, did you work out how Oswald's rifle without a scope vanished?
Marina is Oswald's own wife. The best possible witness other than Oswald himself to confirm the contents of the blanket. I can understand why you are conflating different issues. The point under discussion here is whether Oswald owned a rifle and kept it the Paine's garage. Marina's testimony, as corroborated by photos, prints, and third-party documents that pre-date the assassination confirms this beyond any doubt. We also know from her testimony, as corroborated by the police search, that Oswald's rifle was no longer in the blanket on 11.22 and can't be accounted for in any other way except as the rifle found in the TSBD. We also know that Oswald lied about his ownership of any rifle. The most obvious explanation of a lie in that circumstance is to avoid implicating himself in the assassination. If he had owned some other rifle not used in a crime and could account for it in a way that was exculpatory, then he would have every incentive to tell the truth and direct the police to that rifle. So we know from Marina's testimony (as corroborated by other evidence) that:
1) Oswald owned a rifle;
2) it had a scope on it because that is the rifle shown in the photos that Marina took (even if Marina had no particular cause to remember the scope);
3) he kept the rifle in the Paine's garage in the months leading up to the assassination;
4) that rifle was not in the blanket just hours after the crime and can't be accounted for in any other way except as the rifle found in the TSBD: and
5) Oswald lied about the ownership of any rifle.
Does all that necessarily prove it was THE rifle standing alone? Perhaps not definitively, but of course there is other evidence to link Oswald to the rifle found in the TSBD including a serial number and print. The totality of facts and circumstances when taken together leaves no doubt that Oswald owned the rifle found in the TSBD.