Quoted from slochar:Pretty sure the bent one is the original style and that your others have been replaced with a newer style. (If you look at planetay pinball's site they have all the wms parts catalogs there with drawings and you can see what was supposed to be in it)
You probably won't be successful unbending it anyway it will probably snap. The bend was likely WMS attempt to handle hard hits on the standup before foam became a thing.
In all the FirePowers I have owned , never seen a bend like that.