I used a magnet to get the barrell out. I just kept, tapping, pulling and wiggling and it eventually came out. Then I used the magnet to rotate the barrell, very slowly, until I could tell it was aligned correctly. When it aligns, it will drop farther into the IP housing. Diesel 911 is correct in that all the parts were stuck together. When I pulled out the delivery valve to change the o-ring, all the parts started coming with it. The barrell was raised just enough to spin and become out of alignment. - Tim