What guns do you have multiples of? I was just thinking about this.
I suppose in the most literal sense the only guns I have true multiples of, in that I can take parts off of one and put them on the other and have them function, are my SKSes and my newly acquired pair of XD40s I already made a thread for. From that basis everything else is unique.
Well and I realistically figure at some point I will get a second Mossberg 500. I already know how to work a Mossberg and there's nothing wrong with them, so why switch?
But function/platform wise I have multiple .38 caliber revolvers, even if they're not intechangeable parts wise. If we stretch the definition of gun a little bit I have more than one lever action rifle. Other than that I guess everything else is unique in even this sense.