Did it have the cleaning kit.I have it broke down. I have the parts soaking. The firing pin is free.
If you are at all concerned about slam-fires with soft commercial primers, you should find the firing pin channel is actually machined for a pin tension spring, they were just never fitted to most production rifles because oil and debris would build up in there and harden in cold weather, causing issues.It had some powder fouling mostly. And was dry. I didn't notice any cosmoline.