anybody know if some PSG-1 grips will go on the armalite?

No.  You have to stick with grips that go on the AR-15.  Now, if you are talking about the PSG-1 TYPE of grips that go on the AR-15, then yes, with mods.  You will need to either remove part of the stock or cut a slot in the grip to allow the stock to go into it.  When I put on Hogues on my AR-50 I had to round the top forward edge of the grip and cut a slot in the back bottom of the grip to allow it to go on.  If you do these mods to the wooden target grips that go on the AR-15 then it will work too.  It might look like hell but it will go on.  Or you can round the top forward edge of the grip and cut off the bottom part of the stock that would hit the wooden grip.  IMO do not cut your stock.

I put a Sierra Precision grip on mine.   The AR50 grip is modified.   That is why it sits at a funny angle.   I had to remove materiel from the top of the grip which is not too hard because of what it's made of.   I cut about 1/2" off of the stock "tang" to clear the grip.   You cannot tell I did anything to it.
It will take a little fitting work but you can definately put that grip on your AR50.

I have been thinking about doing this on my AR-50.. Can you guys post some pics of the modified grip before and after you installed them?
Thanks

I am trying to fit a Royal Arms onto my AR30....I never thought of the PAG1 type.