Without measuring it, I can't say for sure, but if you want to use factory Rem-Coke tubes, you'd probably need to get a new barrel.
It's been my experience in the past, the older non Rem-Choke barrels don't have a large enough OD to be retro fitted with anything other then Tru-Choke pattern tubes.


There are two types of gun enthusiasts ... Those who have been F#CKED by PTG and those who will be!

~ unknown