Attach component with component ue4

i have create a push button with attach rod and base. when button press then size of rod increase then decrease after delay. the base is also move with rod as it is child of rod. the problem is that the rod increase and decrease but the base detached from rod after increase the length of rod.

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Make sure physics is not enable for these components.

but i want to push the block with this. if i disable the physics then it not push the block just pass through it.

No, it will move it just because they are parented in the component list…