Quite welcome. Take pics when you have it together, I'm really interested to see one of the MST's on an M25. I previously had an SN-3 1.8-10X44 on my M25 in a JAE stock and now have a SN-3 1.8-10X37 on my JAE in a Sage stock. The lowest I was able to get away with was 1.065" rings due to the rear sight. I then went to 1.189" high rings and then 1.185" high rings. With the 20MOA rail I went down to 1.02" high rings and clear the rear sight by 1.5mm. I could have gone with 1" high rings, but opted to try the ARC M3 rings instead of getting Badger Ordnance. Like I said, without measurements from your rifle I can't get precise, 1" may work, but 1.125" will work.