Working on a 12ga Maverick 88 for a friend. It seems to miss fire when you rack the slide gently. If I rack the slide hard it will fire everytime. I have pulled it appart several times, it is not dirty but the arm that swings and hits the firing pin doesn't retract all the way when softly racking the slide. It only goes about 25 degrees of the way. When you rack the slide with authority it will lock back 90 degress. Hope this makes some sense, it is the best I can describe it. What if anything can I do to fix this or is it just the way it is with a 88. Smokey