I can't argue with Steel Fan, I have my other bases covered so for me maybe semi auto stuff would be good to stock up on.

But, if I had to take just one a trusted long range hunting rifle would be my go to. SFan is also right in the fact you never know when you might be asked to go hunting so having the capability is good. A SOD, Glock, 870 and the 700 and you would be really set.