Sounds like a plan!
Normally it will be on the link ejection side (chute) stamped somewhere on there. If not there it'll probably be on the topcover or backplate. There are no dataplates on these types of weapons, just stampings.
If you think you can break down the mount then you could possibly start shipping that. I seem to recall that most of it is riveted together so you might have to take an angle grinder to get the big parts apart. Maybe not however....different manufacturers assemble using different methods.
Be dang sure you have the bolt fully forward and the striker popped when you attempt to remove the backplate. If you dont you will have a fairly large coil spring in tension and it will shove the backplate back at you and damage the retainer in the process. You'll know if it is, it will be hard as *$^% to take off.