I just upgraded my TM M&P 9 V with a Nova metal slide and some UAC part but now, as you can see, the slide get stuck on the way back after each shot, so I have to manually push it back.
I don't know if it's because of the UAC part I put (sear, hammer, hammer spring) in the frame but I found out that the slide get stuck at some point when the hammer bearing touch the blow back unit.
On the BBU, the hammer bearing get stuck on the metal part on the right of the nozzle (see on the picture).
So anybody have an idea of how I could fix this ? Maybe sand the metal part on the BBU ? Also I lubed all the parts well enough but it's still too tight to slide freely.