Re: TRG 42
I believe I used the Nightforce 1" steel rings on this rifle. You MAY be able to use the .885" rings on there but I don't know if the bell will have enough clearance.
I just had the wife have a look for me as im still at work. She said they measure up to 1" so those should work but I would measure yours just to be safe.
Also, you will probably want to but 3 rings on that thing as the TRG-42 kicks quite a bit. I run dual rings on the back and a single up front.
Tim