Apologies, too brief there. To expand, I was sent a T3 unit by GMK in error, it didn't fit, but this could just be due to the angle of the thumb pad on the safety lever. However, that's not a very easy thing to modify.
I went on to purchase a unit from Bix n Andy, which I was assured they'd done many times. Turns out it also didn't fit due to the safety lever. I had to modify the action of my M595 slightly to make it work (done after consultation with a most revered riflesmith). Bix n Andy solution was just to bend it, but to me that was not the solution, it was simply the wrong shape.
In summary, do not order anything that is designed for T3 and expect it to be a straight fit to M595/M695.