RC's correct, as usual.
I forget exactly how to turn the bolt in that situation. One way is to press the little button, and rotate to the right. If that doesn't work, then find a flat surface. Put the rectangular part of the bolt (it's directly behind the bolt handle in your first picture) on that surface, and pull down hard while rotating the body right.
When the safety is parallel to the bolt handle, you are good to go.
EDIT: I shouldn't give troubleshooting advice at 12 AM