Talk:Twin Gremlins/@comment-9977285-20130825193105/@comment-74.170.211.114-20130827172812

Because they would have to put the stun chance for every type of mob in the game that can be staggered. Some weapons only stagger some enemy types. Fragor staggers grineer 100%, but won't stagger MOAs at all. Reaper Prime staggers all units that can normally be staggered (everything except rollers, heavy grineer, drones/osprey, runners/leapers). So, there's no easy way to write a stun chance.

In general though, don't use stun mods for anything except sentinels and maybe shotguns. Most weapons have either 100% stun chance against an enemy type or none at all, and the ones that do have a more random stun chance usually don't benefit from the stun mods enough for it to be even close to worth the points. Fire rate will be a better stun chance increase over time on most weapons (and this with a damage increase).