The wings take up slots on the model.
The rules allow more options then you can fit. Your can call the “hand” bits on the wings rending claws, or the feet as scything talons. Both could look the part. But wings plus all the gun options is not posable out of the box without some work.
I just glued the wings on, and magnetized the lower arms. I worry that in the next codex, whenever that drops, we might loose out on some options. Some codexes go that way, while others keep things open. Not going to borrow trouble from the future. I’ve got magnets for that. But I didn’t do any custom kitbash work for something that might become obsolete.