how to spawn item with max stats?

[weedmen]

how to spawn item with max stats? 
I use the giveself command but the stats are random, I would like to know the maximum damage of each weapon 

 

[meganoth]

Get yourself 10 weapons of the same quality, the average or the value most often found should be the base damage. Add 15%, that is the max damage.

(The base damage can also be found in the XMLs, every quality step adds 10%)