If you want to keep that front sight, it's no biggie to knock the pins out of it , pull it off, to install, then re-install. I've done it a few times without any problems. I douse the pins and fsb/barrel juncture with Kroil and let it soak overnight to loosen things up.
Just make sure you pound the pins out on the smaller of the two ends. Most I have are pinned in with the small end on the port/left side, but I got a DSA barrel that was pinned the opposite way.
A couple YHM floaters I installed this way,