Noted that MC rifle had corrosion inside barrel , Thus not likely fired although it’s possible it could have been displayed at the SE window.
However that idea is refuted by Amos Euins WC testimony
Amos Euins apparently saw one shot fired by a rifle held in the hands of a male human being at the SE window of TSBD
Also refuted by Harold Norman WC testimony as well as his video interviews
Harold Norman on the 5th floor directly below the SN 6th floor window heard 3 shots in a span of approx 4 secs judging from his several video replications. He suggests hearing the shells hitting the floor also ( WC statements)
Alternatives:
A. just one shooter with a semi auto rifle with large scope, whom was briefly seen at 12:15 at the SW window by Rowland, then this gunman switched to the SE window after Bonnie Ray Williams left the 6th floor approx by 12:24.
And for some reason the other witness except for Rowland were unable to see a scope on that same rifle as it was displayed at the SE window.
B. 2 shooters, no.1 at the SW window using a large scope 30.06 type hunting rifle and no.2 shooter using a rifle without a scope at the SE window
Since Euins claims seeing one shot fired from the SE window rifle, then the MC is a pre planted rifle not fired nor displayed. Purpose not exactly known, although speculation has been offered that It was a means to implicate Oswald, yet simultaneously give Oswald some reasonable chance of not being exonerated, thus enabling a CIA mission for Oswald to “defect” once again, this time to Cuba.