So i spoke too soon. We tried it today and they do fit the threads are the same. the Classic fronts are a bit longer on the bottom (where it goes into the back) but they do seal properly. with a 14" front it'll be 18" barrel
This is great news! .. Ive been trying to get my hands on a classic kit.. i know theres one floating around locally right now but I havnt been able to find it..Thanks for the info rohh I do need to get some small bore backs..
I ran into the guy with the classic kit this past weekend, and checked the compatibility between his classic and my pro-merc. The classic fronts fit on the pro merc backs and seal nicely, but the classic backs do not fit the pro merc fronts. Although they are the same threads, putting a pro merc front on a classic back won't work.