Yup. If you put the bow in, you need to readjust the screw in the bow that removes the slack. With the factory trigger you'll not be able to take out all the slack or the trigger won't reset. If you do buy the Geissele trigger pack one day, you can adjust that screw to take out pretty much all the slack, but for now, strip the riffle down and put some slack back in. I was able to removed the barrel, put the upper plastic and charging handle back on, bolt assembly in, trigger pack in. Rack the bolt, dry fire and adjust with the allen key. When I found the prefect setting, put the while riffle back together. (Remember: never turn the barrel lock with the charging rod in place)