Same receiver wrench for both. Mine is being used by someone else.
FWIW, I did my first one with some oak blocks to hold the receiver and the bolt carrier to keep from crushing it. I used a metric wrench on the barrel flats. FALs aren’t that complicated to assemble.
The tool you really need is the pin gauge for measuring which locking shoulder you need. I assembled and checked headspace. I got lucky on the first 2. I borrowed one for the others.