I had my RX2 apart couple of days ago and tonight I was looking at gunspares site at the hw90 part list. I noticed the the barrel pivot bolt screws into another hollow screw, not a "nut". And I was looking at the cocking shoe on their site and it's one piece. On my RX2 it's 2 pieces. Is that normal? and with the stock off and the barrel cocked in the down position (not in battery), I can take the cocking arm out of the shoe. So is that normal also? Thanks in advanced