If its an automag bolt, it should fit, even if its an aftermarket one. If you do have an ANS bolt and an AGD bolt, use the AGD bolt. ANS bolts can cause
A classic can handle up to 16bps before shoot down. Some can go a little higher or lower. Make sure that the orings are good, especially in the on/off
i would make sure you are using the updated on/off top.