I opened about 12 of the 1K boxes and got several things I can use. When I edit load out and double click on the open slots I have no options at all!

I have like 15 items in inventory...no idea how to use them or even look at them.

They might be mods for weapons you dont have since the only thing coming out of 1k boxes at the moment is weapon mods and cheap re-skins

The OP should be able to add any mods to the reskinned weapons as well, provided they are for that weapon.
On a side note, I started getting mods for my Plasmagun out of the 5k Supply Crates finally. So weapons of that tier have their mods in the 5k Supply Crates at least.

You are correct....It was mods for certain weapons.

I read that we should buy all 1k boxes first so we do not waste points on 5k getting 1k box items. I probably only have a few more 1k to get then moving to 5k. GOOD tired of getting facerolled and needs better Dakka