After a shot I went to reload and arrow would not go on the cylinder so I looked down the cylinder and saw this poking out from the bottom of gold piece that screws on the end of the cylinder/shaft that you slide the arrow on. I took the gold piece off and removed the white piece (pictured) and it slides on fine. The shots after removing this piece were hitting allot lower. I'm not sure what this piece is and if it is part of the gun or arrow itself so can someone please let me know?