hello everyone. New here. (used to be more of a shotgun/rifle guy) just picked up a sig p224. cute little piece. having an issue with the slide not releasing when pressing the slide catch lever. I have to pull the slide back and press the slide catch lever for it to let go. I took gun apart and checked spring. everything is cool. just can't figure it out. any ideas? its a new old sig. I realize its old but it was never fired and picked it as new old stock. please help. thanks.