[Animation]How do I avoid animation montage goes back to initial pose when it's finished?

hi, i’m working on the weapon animation. you know there’re a lot of animations for the weapon, such as reloading, shooting, opening/closing etc.The problem is that i use animation montage to play animations. when the shooting animation is finished, it’ll goes back to first frame(initial pose). what i want is stay there when finshed. fist i play opening animation then closing animation,but it’ll goes back.anyone can help me?thanks a lot!