A neighbor bought himself a new plinker a few days ago , a Ruger 22/45 . After a few hundred rounds , he field stripped it to give it a good cleaning . I got to admit , they are a little tricky if you've never assembled one before . Well , we took it apart and showed him from the git , two things you must do or it just won't work ! Stuck the poly frame on upper , showed him trigger hammer , push it down , spring up , push bolt back in , point muzzle upwards and tap to align main spring and trigger hammer and poof ! I have seen people do this a dozen times at least ! It will go back together but you can't rack it or pull trigger ! After you do it a few times , it gets easier ! Nice little shooter though !