I'm at the stage now. Got my spring bar tool recently and wanna try to change to nato but no matter wad I do the spring bar won't move out of the lugs. Wanna cry lol..
U will need to apply an upwards or outwards pressure while doing it.
1) use spring bar tool to push in spring bar to release it from the lug hole
2) apply upwards pressure to get spring bar out of lug hole
3) maintain pressure so that the side that is out already do not slip back into hole while u move on to work on the otherside.
4) use tool to remove the spring bar of other side.
5) the whole strap plus the spring bar should pop right out.
Take note that removal is the easy part. Putting it back is normally the harder part and when people lose their spring bars. Do it with caution, care and of course, some sticky tape.