Yes, the 3-9x PR is indeed a 1" tube.
I believe you want the "low rings" with the 40mm tube, but HS will be able to answer that for sure (each manufacturer has slightly different hieghts for their low, medium and high rings).
For quality 1 piece bases
Leupold Mk4
Badger
IOR
There are some others out there also, but those are off the top of my head
MEL
I believe you want the "low rings" with the 40mm tube, but HS will be able to answer that for sure (each manufacturer has slightly different hieghts for their low, medium and high rings).
For quality 1 piece bases
Leupold Mk4
Badger
IOR
There are some others out there also, but those are off the top of my head
MEL