I had an MGW SIG sight tool when I was invested in the P Series SIG's. It did both the front and rear sights.
I had a P250 as well, but didn't have it long enough to have to change out the night sights. I know the rear sight was different, and Im just assuming the tool would have done the front. If I remember right, the only P Series gun at the time that it wouldn't work with, was the P230/232.
The MGW tools are a tad pricey, but they work well. I currently have one for my Glocks. If you're changing out a lot of sights, the old sights can help pay for the tool, and once the tool is paid off, helps cut the price of the new sights. I was getting about half the price of a new set of night sights selling the old old ones took off on eBay.