Welcome!
The only warning is that sometimes the thread locker FN uses on the bolts to remove the barrel need a bit of heat before the loosen but I've only ever needed a low power heat gun. But it's a pretty easy swap.
I guess warning 2 is that now is a good time to also add in some PMM rail elimination panels before you put your gun back together again. Plus order a few gas jets if you want to tune them.
