Help Does anyone know how to identify a long gun?

[Mayfly]

I'm so excited — I've discovered some sort of long rifle at my parents', and all I've got to do is identify it so that I can buy ammunition. Is there a good way to go about doing that? I think it's real since it has a nice weight to it. I can't believe I'm so close… Thanks in advance.

 

[Mayfly]

Oh I'm terrible with them T_T So many of them look similar, so I was wondering if there was a sort of science to getting it accurate
I'll look more — thanks!

 

[locked*n*loaded]

It has stampings on the side of it that tell you what it is (99% of the time).

 

[Mayfly]

Thank you :-) I didn't give it a thorough look-over, though I probably should have before asking! I guess I got a little overzealous
I'll keep that in mind