OOps you are right. I just got a S'G' Carbine and thats what the tool is fore.
The 03A3 had a parked rear sight and I tried to drift it off and replace it with a blued one but the dove tail section is very thin so I removed the park and cold blued it on the gun. Looks okay and I didn't break the receiver.
I have to many guns and to few brains.