I bought a 22/45 a few weeks ago and im trying to take it apart and clean it for the first time, when I pull down on the latch the main spring housing pops out about half an inch but it wont swing out any further, I cant figure out what it is catching on. the latch at the bottom is clear of the handle so I know its not that. ive been pulling pretty hard and it still wont swing out. anyone know what im doing wrong?