I have two M595s in GRS laminate stocks, one is in a stock that was originally for a Howa 1500 but which I modified - there’s a thread about it somewhere. The other is in one that is factory inlet for the M595 & was just ‘drop in’ but which I decided to bed as well.
This summers ‘off season’ project is going to be modifying a GRS Berserk synthetic stock inlet for a T3 to take an M595 so I have a more weather resistant rifle for next winter.
The GRS layout just works for me, it’s like wearing an old pair of shoes!