I think the CH ought to be pulled. If the CH is pulled, it will nudge the ctg at the 6 o'clock area as seen in the photo and urge it upwards. Also, after he strikes the rifle on the ground, if the CH is pulled, it will hold the bolt to the rear and not re-jam the ctg if it should not fall free once the bolt/bcg moves rearward over the ctg base and begins it's forward movement. And, if the ctg falls free, he'll want the bolt/bcg held to the rear and locked so the ctg can be totally removed and the chamber/receiver area can be inspected.