Modifying

Modifying 

You can modify any weapon with attributes that match the weapon 

If you go into the modifying tab you can place any weapon to modify in one slot on  other side are 9 slots. the modifications depend on the things put in the slots

You can get bad modifications these are just as likely as good ones 

Putting scrap in will give you more lower quality ones

Putting refined metal will get you less but higher quality mods with much less chance of bad mods

Puting weapons in will give you quality a similar to them. weapons that are more or less similar will have a higher or lower chance of being successful most qualities have an extremely rare chance of appearing and the very rare ones have large negative modifications thrown in