That looks like an RRA 2 stage trigger and the spring does look funny. The top leg looks like it's under the trigger pin instead of on top. That would reduce hammer force.
Its actually not under it, there is just a bad shadow on that photo. I took another photo, and compared it to my friends rock river today, it seems to look the same.
This photo should be better. I may just wait till this weekend and pay attention to when it happens, to figure out whats going on exactly. Its getting about 300+ rounds put through it this sat.