ZCI ZCI HOP-UP BUCKING 70° BLACK
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Great quality hop-up rubber from ZCI. These buckings include the arm nub plus a molded rounded nub inside.
The 70° or durometer, refers to the rubber hardness. The higher the number the harder the rubber is. For high FPS 450+ 70° is often better. For lower FPS softer rubbers are generally better.
Colour is black.