[Linked Image from i.imgur.com]

This is my Dad's 10/22 from the way back. Idk how long he had it, as long as I can remember. Anyway, shout out to Ruger because they haven't changed their magazines in the 60 years since it was first introduced. The original magazine got lost somewhere in time. I bought one off the shelf, loaded it with 5 rounds of CCI Blazer to do a function test. I pointed it into the ditch and it went pew pew pew pew pew and then click. Do the new ones have last shot hold open? This one doesn't. The serial number is not available on the online lookup, idk if it's because of age.