Tried out Guns Modify G17 V3 glock hammer, and here is a comparison between this hammer and the AIP steel hammer. All I can say is WOW! the dynamic bearing (DB) on the Guns Modify is much better than the AIP circle bearing (CB).
Here is a list of reasons why the Guns Modify is better than the AIP
1. The DB, having flat surfaces allows the bbu to glide much more smoothly compared to the CB that is rounded. The DB runs flat against the bbu, while the CB touches the bbu at one point (kinda like a tangent to a circle), but is constantly being pushed down by the bbu when the slide cycles given the cylindrical nature of the CB. Because of this, when the slide is racked even though the hammer is cocked, you feel ABSOLUTELY no friction with the DB. This is not true for the CB.
2. If you look at the picture below, you can see that the front of the hammer is much more flat and steep on the Guns Modify compared to the AIP. Again, this reduces resistance the bbu has to overcome when the slide cycles back.
3. If you look at the picture below, you can see the notch on both hammers that the sear engages. Notice how the Guns Modify notch is more sharp compared to the AIP steel hammer. As such, the Guns Modify hammer is able to be released much faster because of the drastic change in angle at the notch, as opposed to the notch on the AIP hammer where it is shaped more like a hill.
The Guns Modify G17 hammer (V3) is a drop in fit and works pretty well with my AIP sear, AIP valve knocker, and AIP valve delayer. Gun cycles with much less resistance now, and I can barely feel the hammer being cocked when I rack the slide back. Enjoy.