None of the older style bolt lift kits will work with the new singe piece firing pin but this one will. Made some improvements and the results so far have been very good. Some times bolt lift is improved by as much as %50 though most tend to be in the %20-30 range.
What makes it better and different? This new kit I made uses a specially modified thrust bearing and a spacer for the BAS screw. One thing I noticed is that most other bolt lift kits compress the firing pin spring more which does the opposite of decreasing bolt lift. The spacing ring fixes this issue. Also the thrust bearing takes friction down to near zero compared to all the other kits that still have friction.