So, you are in fact saying that Oswald's print was indeed on the rifle?
NO! Emphatically NO!
Detective Day saw a SMUDGE on the wooden foregrip that he imagined to be a palm print while dusting the rifle in the TSBD. He lifted that SMUDGE "Palm print" wit scotch tape as Tom Alyea watched. He placed the lifted smudge on a small white card ( Now know as CE 639). He turned that white card, along with all of the evidence, over to FBI agent Vince Drain at midnight on 11/22/63. The FBI were unable to find a useful print on that card.
But they did manage to change that smudge into the palm print of Lee Oswald after they sent all of the evidence back to the DPD. and concoct the tale about Day disassembling the rifle and lifting that print from the metal barrel of the carcano.
A person can't believe a damned thing the police said about the evidence most of it is created by the lies.