I didn't bother with extra stuff until sequence 6, before that I only did story missions.
now that I am at sequence 6 I haven't done a single story mission, instead I explored the frontier doing some hunting missions, I stumbled upon quite a few chests and some of them contained new weapons, I thought I will look at them once I'm back at the homestead and decide which one to use.
so I went back to the basement in the homestead, I cannot find a single weapon on the racks, where are they ?
they do not appear in the weapon selection wheel as well, I did once sell all the stuff in my inventory that I've gathered during hunting, could I have sold them by mistake? I did check before choosing sell all option and I only had animal parts.